You can't really, except with cheats. Mudkip is a starter so you can only get one if you choose it at the begining of your journey.
extremely sorry to embaress you but you could only find mudkip in ruby,sapphire or emerald!
u can't catch a mudkip somewhere else. u can have it if u choose it as your starter. in Pokemon shiny gold u have the chance to caught a mudkip in union cave but it is hard to caught a mudkip cause it is rare.!!!!!!!!!!!1 so don't get fool of finding a wild mudkip
You can not catch mudkip in Pokemon Xd. You can however catch the Johto Starter, Totodile, Chikorita, and Cyndaquil by completeing mt. battle without exiting or switching Pokemon from begining to end (MUST select NEW CHALLENGE) and to gat a mudkip you must trade one from Ruby/Sapphire/Emerald
no but you beat the game you may migrate a mudkip from Pokemon emerald version /leafgreen/firered/Sapphire/and rubie.
you have to get it as a starter to get it
Treecko, Torchic, and Mudkip.
The starter Pokemon are Treecko,Torchic and Mudkip.
Cheat.
mudkip
Pick mudkip
Torchic, Mudkip and Treecko
torchic,treeko,mudkip