If you want to know why I picked charmander read my comment in the other poll about who should be mascot if pikachu was removed my comment was a good long one so its worth looking if you want to see.

It's hard to replace Pikachu, but I would say Lucario.

I say piplup since it was the co mascot with pikachu during the DP saga just like Dawn was the co star with ash and during BW piplup was in many anime posters despite its gen being done even in trailers for the new mystery dungeon game it shows pikachu and Piplup as the promotion team