i think you can use the firstPokemon you get in the beginning . i used that Pokemon XD
My Pokemon to defeat Iris were Level 45.
Pokemon with fighting type moves
You need to be at less 68 or over and need a lot of items.
This depends. What Pokemon are you trying to defeat? Try to get all legendary Pokemon.
yes you do
your Pokemon need to be lv 40 to beat him
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!
Psychic
No you need to see the lengendary pokemon
you need lucario--------------------------------------------------------------------------------------------------------------------------- You just need Pokemon that are effective, or high level etc.12334angel