lv. 36 like the others
36
Marshtomp will be able to evolve at Level 36.
Marshstomp evolves into swampert at level 36
I think dont blame i was wrong but i think at level 15 or 16 i am not sure
If your marshtomp is level 36 and doesn't evolve either its holding a everstone or you are preventing it from evolving by pressing the B button.
After you best the game (Beat Rayquaza) you go alone with your mudkip to the town square and notice that there is a hole in the ground, you go in it you ask to evolve it evolves you into a marshstomp or Swampert if it evolves you into a marshstomp just do it again and you will evolve into a Swampert
marshstomp
Mudkip learns Hydro Pump at level 42. Sorry, he can't learn it if Mudkip evolves into Marshstomp or if it is a Swampert.
Marshstomp evolves into Swampert at lv. 36.
37 or 39
To beat May, the best thing to get is a Roselia and train it really high. It learns Mega Drain @ lv.17
mudkip doesn't need a item to evolve the evolution stage goes like this... MUDKIP---> LV 16---> marshstomp--->swampert...i suggest you get the guide book from BARNES & NOBLESor TOYS R US & look at pages 274 & 275...veronicaDon't bother to get the guide book. You're good if you just have the internet. Bulbapedia is free and trustworthy.Hope this helps ^_^