F.F. was obtainable for a limited time as a collaboration character in the mobile game Monster Strike.
Strike Shot: "You can call me F.F.!"
Increases Speed. (12 Turns)
Sentient Plankton, F.F.
Rarity: 5★ (Evolution)
Null Gravity Barrier / Super Null Warp / Demi-Human Slayer M
Strike Shot: "Foo Fighters"
Fires Foo Fighters at the aiming direction + Lowers enemies ATK and DEF for some turns. (16 Turns)
High Cross Stinger
Female Prisoner Trio, Jolyne, Ermes & F.F.
Null Damage Wall / Laser Stop / Null Warp / Multi-Hit Slayer
Strike Shot: "This game of catch isn't over yet!"
Splits into three clones + Attack the first contacted enemy with Stone Free and a ball.
Homing Pierce-struction 12
The Stand form of Foo Fighters also appears as a non-playable boss character.
Strike Shot: N/A