i think its mudkip because some of the Pokemon of the gymleader was weak in water.
whatever works best for you, mine is mudkip
Fire type starter's will get the game finished easier, water type starters are neutral, and Grass type starters will give you a challenge.
It depends in which game.
All of the starter Pokemon are the best
Tepig
the best starter deck are squirtle sindoquil and turtwig
piplup
piplup is the best starter pokermon piplup is the best starter pokermon --------------------------- I chosed Turtwig grass type
Chimchar
mudkip
the best Pokemon to pick at the start is PIPLUP or CHIMCHAR
charizard is not the best pokemon, just the best starter out of all the games,but there are still better pokemon.
Charmander.
tortera
feralligator