Addicting match 3 game with a Pokémon skin. Very minor Pokémon mechanics are added, like catching the Pokémon you defeat and type effectiveness mattering. The Pokémon are all mono-type in this to simplify things a lot, which ironically can throw you off if you know Pokémon match ups very well because you can forget if a dual type represents one or the other of its types.
Some Pokémon will also have basic effects like becoming stronger if you're at less than half health, but these seem pretty rare, and the only Pokémon that has an effect that really tries to fit the Pokémon itself is Ditto which acts as a wild card.
There are some Pokémon that needs conditions to show up in a stage, but 99% of the time it's as basic as "defeat the previous Pokémon with a high combo and/or in one hit", but sometimes it's something flavourful, like beating Eevee with a fire move to make Flareon spawn. On the other hand sometimes it makes no sense, like needing to defeat certain with their own type to make their evolution spawn (and this isn't like acting as an evolution stone like Eevee since these ones will evolve by level up).
Some Pokémon will also have basic effects like becoming stronger if you're at less than half health, but these seem pretty rare, and the only Pokémon that has an effect that really tries to fit the Pokémon itself is Ditto which acts as a wild card.
There are some Pokémon that needs conditions to show up in a stage, but 99% of the time it's as basic as "defeat the previous Pokémon with a high combo and/or in one hit", but sometimes it's something flavourful, like beating Eevee with a fire move to make Flareon spawn. On the other hand sometimes it makes no sense, like needing to defeat certain with their own type to make their evolution spawn (and this isn't like acting as an evolution stone like Eevee since these ones will evolve by level up).