What pokemon defeats red gigaremo in Marine Cave

how do i beat him

In Pueltown there is a building to the left of the gigaremo go in it and you will find a
Growlithe.

Get Craniados as your partner pokemon an use his ability every time Rampardos Uses its
attack. Hope this helps.

why do you lose save data when you lose

I would save just before the battle and turn it off if you lose

I'm sorry I messed up to defeat the red gigaremo you have to catch the nosepass and then
get a gastrodon.

Can you explain to me how did u beat the game?

i need help with the cranidos, they are both attacking me and i can't hit them twice
without dying first. =(