As the Pokemon series has progressed, the ways in which the creatures can evolve has increased dramatically. There are some Pokemon that have had to wait a couple of generations before they gained new evolutions.

With nine generations and counting, you can bet there are a good number of these relative - pardon the pun - slowpokes. It's always exciting when an old favorite gets a fresh evolution in life, and here's every last one of them.

In more recent generations, we've had some pretty powerful alterations among a great number of species - Megas in Pokemon X & Y, Dynamax and Gigantamax in Pokemon Sword & Shield, and even Tera types in Pokemon Scarlet & Violet, if you want to count those. We'll refrain from counting these as evolutions, since for one thing, they kind of aren't, and for another... frankly, it's all too convoluted if we do!

Slowpoke To Slowking

• Generation 1 To Generation 2

Slowpoke decided that the thing clasped onto its tail would make for a fancy hat. All you need to do is trade it while it holds a King's Rock. There's also Galarian Slowpoke and Slowking, and if you haven't seen what that Slowking sub-species does with its rock, well, prepare to cry on its behalf.

The Eeveelutions

• Generation 1 To Generation 2
• Generation 1 To Generation 4
• Generation 1 To Generation 6

Eevee has received the most evolutions out of any creature in the series. The friendship and day/night cycles in Pokemon Gold & Silver brought Espeon and Umbreon You need a Moss Rock and an Ice Rock to create Leafeon and Glaceon in later games. Teach Eevee a Fairy-type move and show it plenty of affection to create Sylveon.

It does seem like - despite fan protests! - Eevee might finally be done discovering new forms for itself. The last time this happened, with Sylveon, was back in 2013.

Happiny To Chansey To Blissey

• Generation 1 To Generation 2

The one true powerhouse of Red & Blue (besides all those other ones) becomes even stronger in Gold & Silver. You need to be really friendly to Chansey in order to make it evolve. You'd think that'd be easy, given how few Chanseys you'll find who aren't smiling, but alas, it takes as long for Blissey as any other friendship-based evolution.

Yanma To Yanmega

• Generation 2 To Generation 4

Yanma is a Bug/Flying-type Pokemon that was introduced in Gold & Silver. It can evolve when it levels up while knowing the move Ancient Power. Formerly a cutiepie (not to be confused with Cutiefly), it really amps up the scare factor in Sinnoh.

Togetic To Togekiss

• Generation 2 To Generation 4

Misty's beloved baby Pokemon, who evolves into Togekiss, gained a new form in Diamond & Pearl. You need to give a Shiny Stone to a Togetic to create Togekiss, and it's well worth the effort. The uptick in competitive viability here is not insignificant, which means as far as the main stories are concerned, Togekiss is great!

Aipom To Ambipom

• Generation 2 To Generation 4

Aipom gains a new tail when it evolves into Ambipom. This makes sense, as it needs to know Double Hit in order to be able to evolve. And, uh, just look at those twin tails. We're not saying we're terrified, but we're not exactly comfortable right now.

Kirlia To Gallade

• Generation 3 To Generation 4

Gardevoir, the famous (infamous?) 'waifu' Pokemon introduced in Ruby & Sapphire, evolves from Kirlia, which, in turn, evolves from Ralts. Starting with Diamond & Pearl, the male version of Kirlia gains a potential evolution, Gallade, which requires the use of a Dawn Stone.

Magneton To Magnezone

• Generation 1 To Generation 4

It seems like Magnemite just keeps on changing. It became an Electric/Steel-type Pokemon in Gold & Silver. Magnemite later gained a new final evolution in Diamond & Pearl, which requires the use of a special magnetic field. There's also, um, Sandy Shocks in Scarlet & Violet - not an evolution, but surely an attention-grabber by design.

Scyther To Scizor And Kleavor

• Generation 1 To Generation 2
• Generation 1 To Generation 8

Scyther gains a new evolution in Pokemon Gold & Silver, which requires it to be traded while holding a Metal Coat. It's an improvement in almost every sense, but do beware, Scizor's new secondary Steel typing lowers its base Speed stat almost in half.

Most recently, Pokemon Legends: Arceus has introduced the world to Kleavor, the powerful Bug/Rock-type which evolves from Scyther when exposed to Black Augurite.

Nosepass To Probopass

• Generation 3 To Generation 4

The Easter Island Pokemon gets a powerful new form in Diamond & Pearl. It needs to be leveled up within a special magnetic field. Magnets - how do they work, right?

Porygon To Porygon2 To Porygon-Z

• Generation 1 To Generation 2 To Generation 4

Porygon was the mysterious top prize at the Celadon City Game Corner in Red & Blue, and its evolution to Porygon2 in Gold & Silver involves trading it with an Upgrade item. The same method brings it to Porygon-Z from Diamond & Pearl forward, this time with a Dubious Disc. Poor Porygon-Z's sole anime appearance is in the opening sequence of a movie that is, in fact, all about the far more renowned Kyurem. The more you know.

Sneasel To Weavile

• Generation 2 To Generation 4

Sneasel gains a new evolution in Diamond & Pearl. It needs to be holding a Razor Claw while it is being leveled up at night. Weavile's increased Speed and Attack make it a much deadlier adversary (or powerful friend). In Hisui, Hisuian Sneasel evolves into Hisuian Weavile - we mention this because they're both pretty dramatically different from their predecessors.

Rhydon To Rhyperior

• Generation 1 To Generation 4

The first true Pokemon in the series (it's a whole thing, look it up if you're unfamiliar) evolves again, starting with Sinnoh. It needs to be traded while holding a Protector. While opinions are mixed on whether Rhyperior is superior in looks, it's definitely tough enough to bring the Rhyhorn lineage up a few notches in strength.

Tangela To Tangrowth

• Generation 1 To Generation 4

This Pokemon goes to college and gets really into reggae in Pokemon Diamond & Pearl. OK, obviously that isn't true, but with how many Pokedex entries it's received through the years, you never know what Game Freak will reveal next. You need to level up a Tangela while it knows Ancient Power to turn it into Tangrowth.

Gloom To Bellossom

• Generation 1 To Generation 2

The Oddish line doesn't always have to end with Vileplume. It can turn into a happy flower in Gold & Silver when it is exposed to a Sun Stone. Really goes to show what a little sunlight can do for the soul.

Golbat To Crobat

• Generation 1 To Generation 2

It turns out that Red was just a jerk all along. If you want to evolve a Golbat, then you need to improve its friendship stat in Gold & Silver. Maybe Red used the poor Golbat in the same fashion Ash did with his Talonflame in the anime - one cannot help but grow tired of constantly being told to find things.

Dusclops To Dusknoir

• Generation 3 To Generation 4

A Dusclops from Hoenn can evolve into a Dusknoir in Sinnoh. It needs to be traded while holding a Reaper Cloth. Many longtime fans aren't as thrilled with the games' 3D renders of formerly 2D species, but we've got to say, Dusknoir looks positively chilling in Paldea.

Elekid To Electabuzz To Electivire

• Generation 1 To Generation 2
• Generation 2 To Generation 4

Electabuzz had to wait until Diamond & Pearl to gain a new evolution. It needs to be traded while holding an Electrizer. But Electabuzz has Pikachu syndrome, if you will; Gold & Silver gave us baby Pokemon, which are essentially new starting points in evolutionary lines. Rambunctious little Elekid was the result.

Snorunt To Froslass

• Generation 3 To Generation 4

Prior to Generation 4, all Snorunts evolved into Glalies. Thereafter, a female Snorunt can be evolved into Froslassl. It requires the use of a Dawn Stone. This new Froslass can then begin freezing corpses and displaying them in its home (check the Pokedex if you don't believe us).

Gligar To Gliscor

• Generation 2 To Generation 4

By now, you've surely noticed, if you didn't know before, that Generation 4 really brought the lion's Pyroar's share of cross-generational evolutions. Gligar needs to be leveled up at night, while it is holding a Razor Fang, in order to become the more sinister (and newly aerial) Gliscor.