The final Direct for Super Smash Bros. Ultimate revealed that the game would be receiving six DLC characters after it was released, with Piranha Plant from Super Mario Bros. being the first and Joker from Persona 5 being the second. However, this leaves us with four empty spots.
Though there have been many rumors about the next DLC character being a representative from the Dragon Quest series, the other three slots are still a mystery.
One of the safest bets for a DLC character in Super Smash Bros. Ultimate is a Pokémon from Pokémon Sword & Shield, as almost every generation of Pokémon game has received a representative in Super Smash Bros. It also serves as a great way of cross-promoting the two series.
It’s safe to assume that a representative from the eighth generation of Pokémon games would be a fully-evolved form of one of the starter Pokémon since this has been the case with the past two Pokémon characters that have been added to the Super Smash Bros. series.
The most likely candidate for the Super Smash Bros. Ultimate DLC slot would be the final form of Grookey, as there are currently no individual Grass-type playable Pokémon characters. The only Grass-type Pokémon in the game is Ivysaur, who is part of the Pokémon Trainer’s team and isn’t a solo character.
Super Smash Bros. 3DS/Wii U added a fully-evolved Water-type starter Pokémon to the series with Greninja, while Super Smash Bros. Ultimate added a fully-evolved Fire-type starter Pokémon in the form of Incineroar. This means that we are still missing a Grass-type Pokémon.
We know that Masahiro Sakurai isn’t opposed to adding a Grass-type starter to Super Smash Bros. Ultimate, as he revealed that Decidueye was almost chosen to be the Alola representative instead of Incineroar.
If Grookey’s final evolution is turned into a DLC character for Super Smash Bros. Ultimate, then this will mean that we have three fully-evolved starter Pokémon from three different generations of Pokémon games in Ultimate, with each one representing one of the three elemental types used in each trio of starter Pokémon.
If Grookey’s final evolution is one of the DLC characters added to Super Smash Bros. Ultimate, then it will likely be one of the last ones released. Pokémon Sword & Shield are due to be released at the end of the year, so it would make sense for a representative from the game to be added to Ultimate around the same time. This means that it may be one of the last two DLC characters released for the game unless Nintendo decides to create another Fighters Pass with more characters.
Pokémon Sword & Shield will be released in late 2019.