a water and mud type, i think
Mudkip is a Water type pokemon.
Mudkip is #258 in the national pokedex, and it is a Water type Pokemon.
Treecko the Grass Type Pokemon Mudkip the Water Type Pokemon Torchic the Fire Type Pokemon I recommend Mudkip.
Treecko is the grass type,Torchic is the fire type and Mudkip is the water type. If you are choosing one I recommend Mudkip as it evolves into Marshtomp then Swampert which are both water ground types.
Mudkip is a pure water type. It doesn't get its ground typing until evolving into Marshtomp and Swampert.
Torchic (fire-type), Mudkip (water-type) and Treecko (grass-type)
The starters are: torchic (fire) treecko (grass) mudkip (water) by the way, Torchic becomes part-fighting type when it evolves, and mudkip becomes water-ground type when it evolves.
Mudkips a water type. my best guess is in the pond.
This comment has removed by BlahaPhysicOn Pokemon Ruby you just go to prof. Birch and he said to you go to his bag there are 3 choices of Grass, water and fire type so choose the water type its name is Mudkip so choose it and Mudkip will evolve in to Marstomp. Marshtomp can evolve into SwampertBlahaPhysic
The most effective type against Mudkip is the Grass type.
Treecko-Grass Type Torchic-Fire Type Mudkip-Water Type
The Grass starter is Treecko. It evolves into Grovyle, then Sceptile. The water starter is Mudkip. It evolves into Marshtomp, then Swampert. The fire starter is Torchic. It evolves into Combusken, then Blaziken.