Make it learn ancient power, and then level it up.
You must evolve a Piloswine to have a Mamoswine.
A Mamoswine evolves from a Piloswine which evolves from a Swinub.
Mamoswine doesn't evolve either way because it doesn't exist in Pokemon LeafGreen. It evolves from Piloswine who evolves from Swinub, but Piloswine can't evolve into Mamoswine in LeafGreen.
First evolve it into Piloswine then level Piloswine up with Ancientpower as one of its moves
It doesn't evolve at a certain level, instead, in order for Piloswine to evolve into Mamoswine, Piloswine has to be taught AncientPower
Make piloswine learn ancientpower and then level it up at any place
teach piloswine ancientpower and level it up
Piloswine evolves into Mamoswine if leveled up knowing AncientPower
Piloswine evolves into Mamoswine when he learns AncientPower, sometime after Level 33.
no but to evolve piloswine take it to the move teacher give him a heart scale and teach it ancient power if you have past the offer to let it learn that when it reaches the right lvl. BBanswer830
Piloswine does, it evolves into Mamoswine.
Piloswine doesn't evolve into Mamoswine by level. It will evolve into Mamoswine by leveling up while it knows the move AncientPower. Swinub can be bred to have this move, or you can go to the Battle Frontier (after the Johto Elite 4) and use the move tutor there to teach it to your Swinub or Piloswine.