you could use action replay but if you dont have action replay train at the Pokemon league which will take about a day depending on its level when you start.
you can if you use cheat codes someone in Pokemon red or blue used cheat codes for his/her team to be higher than lv100 like his/her golduck which is lv133. Hope this helped!
well the way to have lv100 Pokemon without AR is simple....... RASIE IT!
Get a action replay,update it then use the cheat"999rare candies"
u get a Pokemon that is good against it or u get an action replay code 4 "instant kill " @ www.codejunkies.com
you have an awesome team but you're using too many legendaries take latios out and put in a electrical Pokemon or a dark Pokemon because you have 3 Pokemon that are legendaries.
Its great.Did you cheat to get arceus?
darkrai lv 100,giratina lv100,palkia lv100,heatran lv100,creselia lv100 and salamence lv100.
Trade it using the GTS.
Mewto lv100 Mew lv100 and Ho-oh lv100
arceus lv100 dialga lv100 palkia lv100 darkrai lv100 giratina lv100 deoxys lv100
Only on tuesdays...
You have to love and train your Pokemon.