Xemnas007

Yeaa but tried looking for Yamask and no clue at all and power split seems like the best alternative.. Thanks for the help

Yamask is found in the Goldenleaf Gym. Also, since you're at this point in the game, I suggest you catch a male Rattata/Raticate, level him up until he learns Endeavour, then breed it with a Phanpy until you get one with Pickup. Bonus points if you then breed female offspring with a Seel (Game Corner) which learned Ice Shard.
Trust me, you'll thank me at some point.

Actually got passed all the way and currently facing Angie