Feebas

Feebas is card 37 in the Evolving Skies set (2021), a common Pokémon card with the Water type, so it has a blue card frame. In Tall Grass Club you'll find it about 1 in 9 packs when you open free Evolving Skies packs.

Commons turn up in every pack, so this is an easy one to collect.

Want to know more about the Pokémon? See Feebas in the Pokédex.