Def EVs (Pokemon) - Geodude / Hippopotas [Ruin Maniac Cave] - 1 Def: The Ruin Maniac Cave is full of Geodude and Hippopotas, both of which give 1 Def EV each. Watch out though, Geodude knows Selfdestruct. If your Pokemon is KOed by it, you won't get any EVs! Both Geodude and Hippopotas are found at Levels 22-24. It's there, you must have missed it Rawr :P. Good luck getting everything together Erodent ^^).