The answer is quite simple. Go somewhere far in the game. I don't recommend catching high leveled Pokemon, because a trained one is better than a caught one.
You can find high leveled Pokemon at sky pillar and victory road.
Pokemon ruby's version IS Pokemon ruby.
levels 55-61
Arceus is not possible to find in Pokemon Ruby. It was released in 2007 with Pokemon Diamond and Pearl
High level Pokemon.
You can't in ruby.
You can find all kinds of pokemon.
In the game Pokemon ruby destiny
Piplup is not found in Ruby.. Piplup wasn't created when they made Pokemon Ruby.
You can't find raikou in ruby.
Find pokemon!
First of all, please improve your spelling. Second, you don't FIND the Sapphire, or Ruby. There's Pokemon Sapphire AND Ruby.