You have to get the fast bike from the shop, then go back to where the mudslide was, gain some speed and you should be able to get up there.
You won't be able to and if you could Ruby would mess up because that's not a Pokemon in ruby.
With the seventh badge in Pokemon Ruby version, you can control caught or traded Pokemon up to level 70.
the strongest Pokemon to fight in Pokemon ruby is not victory road it is in the sky pillar the farther you go up the higher level they get.
Ash, Pumice, Pyroclastic flows, lanslides and obviously lava
Pokemon ruby's version IS Pokemon ruby.
with a lucky egg or with cheats -.-
i haven't played that version but if you go to youtube search up pokemon ruby walkthrough
up your rump
Pokemon Ruby has Pokemon that Pokemon Sapphire does not and Pokemon Sapphire has Pokemon that Pokemon Ruby does not.
If you trade Pokemon between leafgreen and ruby ruby will have your leafgreen Pokemon and leafgreen will have the ruby Pokemon both in the party they will not be sent to the PC unless you personally walk to the PC and do so.
ruby
Train your Pokemon up by battling not by daycare because they will be stronger