Only Pokemon trainer that can level up is you. (Your rival is the one exception.) All the other trainers in the game are preset and can't level up.
You as a trainer get stronger by having stronger Pokemon and beating the gyms. each badge makes your Pokemon respect you more.
Make sure both your trainers are at the same pokemon centre
You can't make your own pokemon.
my easiest way is to take the vs seeker (from the girl at the P.C. in vermillion) and battle the bird trainers east of fushia city with an electric type. also put an amulet coin on that Pokemon for double money
First you must make it to cerulean city, if you did good now you must train your good Pokemon to at least level 20 or higher and to do that go north to nugget bridge and beat the trainers, still having trouble? Continue your way north and go east and there will be plenty more trainers for you.
You need to link with a friend
No. You can battle wild Pokemon, trainers in the game, or battle a friend using the MultiPlayer link cable feature.
Make sure both your trainers are at the same pokemon centre
The point is to raise your Pokemon to make them stronger. That's why there are other trainers to fight so your Pokemon will get experience points and level up to be stronger. The more they level up, the more friendly they will be so they will like you more.
You can't make your own pokemon.
My mom
I'm sorry, but if you have come across a shiny Pokemon and have caught it, then there is no way you can make it a normal Pokemon.
how did u get mew
No. Poke'mon Master
You can give the pokemon a Lucky Egg (which boosts exp gain by 20%), or simply face trainers and not wild pokemon, because trainers give out more exp.
Well you can get an action replay and use that or just keep battling trainers, not Pokemon. Battling Pokemon is slower than battling trainers.
i wouldn't do that it could mess up the game just keep battling with trainers to make your Pokemon stronger and you can defeat the Pokemon league
my easiest way is to take the vs seeker (from the girl at the P.C. in vermillion) and battle the bird trainers east of fushia city with an electric type. also put an amulet coin on that Pokemon for double money