Kirby and the Forgotten Land
In Lab Discovera, they fight a lion named Leongar, who wants to use an alien to go to a different world. After you beat Leongar, the alien is woken up, and combines with Elfilin to become Fecto Elfilis, who tries to crash Kirby's home planet, Planet Popstar, into this world. Kirby beats Fecto Elfilis, and then Elfilin stops the two worlds from crashing.