You can only acquire Swampert in Pokémon Ruby if you picked Mudkip as your Starter Pokémon and then evolved it into Marshtomp at Level 16 and then evolve Marshtomp into Swampert at Level 36 if you selected the Fire-type; Torchic or the Grass-type; Treecko as your Starter Pokémon then you cannot acquire a wild Mudkip or a gift one so you would have to trade for one that would come from another player.
Swampert does not learn Hydro Pump.
you would have a advantage if you have swampert if you dont like swampert get any of the types i wrote ground,rock or water types
Mega Swampert has the ability Swift Swim, which doubles its Speed stat in Rain.
The only way for Swampert to learn hydro pump is to let Mudkip learn it at level 42, sorry.
Swampert can't be found in the wild. You have choose Mudkip as your starter Pokemon, and evolve it into Marshtomp (at level 16), then into Swampert (at level 36).
Since Swampert is an evolution of one of the starters in Gen.3 , you can only get it through trading or hacks.
Groudoun swampert at a high level
Marshtomp evolves into Swampert starting at level 36.
you cant. you have to start of with mudkip and train it. (unless you have emerald or sapphire and trade it)
You can't catch Zekrom in Ruby version.
you cant catch a man in Pokemon ruby
Mudkip, Marshtomp, Swampert, Zigzagoon, Linoone, Lotad, Lombre, etc.