You need to be at less 68 or over and need a lot of items.
My Pokemon to defeat Iris were Level 45.
yes you do
Yes, you do.
Yes, and you need to get the National Dex too.
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!
you need to send over from another pokemon game using the scientists machine after you defeat the pokemon league.
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.
you need lucario--------------------------------------------------------------------------------------------------------------------------- You just need Pokemon that are effective, or high level etc.12334angel
For 100% completion, you would need to complete the National Pokedex, training them to level 100 with max EVs and IVs. You would need to defeat the Pokemon League and Team Rocket. You can also defeat every trainer and collect every item available.
You need to beat the gym leaders, once you defeat one Pokémon up to a certain level starts to obey your commands. The level increases as the more gyms you defeat.
you must have higher level Pokemon to defeat gym leaders with only three Pokemon you need pikachew,scwirtle and ckiarita
you need the National pokedex and you need to defeat the Pokemon league