yes
It depends if you're from America or Europe. But, my opinion; I think Justice League America would.
With the proper planning, yes. In Justice League DOOM his plans to do so get stolen and used against the justice league.
in justice league heroes there are 13.3 missions you have to beat from start to obviously finish. the point deals are secondary n third missions linked to the starting mission if that made sense to you.
Yes, you beat the Pokemon League first.
EDIT: The Pokemon League's Pokemon are about level 50. If you're pokemon are level 45+ you will be fine but if they're below level 40 you will have a hard time to beat the Pokemon League. I would have told you more but that would spoil the fun for you. :)
Well The Justice League probably wouldn't pick a fight with the avengers because they have had a lot of different cross overs where they were a team together. But if they did start a fight I guess the avengers would win. [Only if you count ALL of the avengers] That mean captain America, luke cage, spiderman, spiderwoman, silver surfer, the xmen, the fantastic four, hulk, hawkeye, iron man, a LOT more. But if your talking about the New Avengers, probably the justice league.
You do not need 6 Magikarps to beat the League... Who told you that!!??
That's hard to say. If it was Justice League vs Avengers, Justice League would win by far. In a crossover event Superman beat Hulk, Batman beat Captain America, Flash beat quicksilver, Spider-Man beat Superboy, Wolverine beat Lobo, Thor beat Shazam, Aquaman beat Sub-Mariner, Silver Surfer beat Kyle Rayner Green Lantern(No surprise he's a chump compared to Hal Jordan Green Lantern), Elektra beat Catwoman, Wonder Woman would have beaten Storm with Thor's hammer but decided it would not be honorable and dropped the hammer and lost, and Robin beat Jubilee.
Beat them again
I would recommend that you use Pokemon that are good against theirs.
You need to beat the elite four and then beat the Pokemon league champion
by hacking