pikachu,turtwig and aipom
attacks first
defeat winona first
The Legend of Thunder.
your Pokemon need to be lv 40 to beat him
between episodes 74 and 75 indigo league
it is to the left of viridian city-where you defeat Gary for the first time
Rush to the Pokemon center and then you get a do over
lvl 20
the first seven badges are with the gym leaders that you have to defeat
First, you have to get through Victory Road. Before you can exit Victory Road, Rival will challenge you to a battle. After you defeat him (if you do defeat him) you can exit Victory Road and enter the Pokemon League. Then you defeat the Elite Four and Champion.
Well, first defeat N from the Pokemon League, then Ghetsis heals your Pokemon and you fight him. You'll need Dragon type Pokemon or Ice type Pokemon with high level to defeat his Pokemon, because there is a really powerful Dragon type Pokemon named Hydreigon. You'll need Grass type Pokemon also to defeat his Seismitoad. Fighting type to defeat his Bisharp and Boufflant, Dark type to defeat his Cofagrigus. Hope this helps and good luck!
There are two different times in which you are deemed the champion. The first time is when you defeat the Pokemon League. The second time is when you defeat Red on Mt. Silver.