Pokemon games do not have cheat codes, along with most other Nintendo games. Action replay may be able to accomplish this, but that needs to be purchased separately.
When you get the second badge from Misty, Pokemon you receive in trades up to level 30 will listen to you., while Pokemon with the same ID as your Yellow Version will always listen. When you get the fourth badge from Erika, Pokemon you receive in trades up to level 50 will listen to you, while Pokemon with the same ID as your Yellow Version will always listen. When you get the sixth badge from Sabrina, Pokemon you receive in trades up to level 70 will listen to you, while Pokemon with the same ID as your Yellow Version will always listen. When you get the eight badge from Giovanni, ALL Pokemon will listen to you, no matter what level or what their ID is.
Level 50. Don't train traded Pokemon past level 50 or they won't obey you.
They do not listen to anything you say. They do not listen to anything you say.
If you do not have any Gym Badges, you will need to get a Pokemon at level 10 or lower to obey. If you get a high level Pokemon from someone, they would never listen until you get the right amount Gym Badges for that Pokemon's level.
No it does not matter.
It doesn't matter what level your Pokemon are.
lvl 20
I asked the question i will check here @ 4/30 and i really meant level 30+ it's my azelf level 50 for your shiny Pokemon lv. 30+
It does not matter where you level it up.
No!
doesn't matter.
You don't need to beat the Pokemon League to get Pokemon up to level 95, just keep grinding on wild Pokemon or Trainer battles. You will get experience from them no matter what level.