Speak to the Team Flare members outside the Anistar Gym, they will hint where you need to go next. Cafe Lysandre.
You can meet Calem at the Lysandre Café, which is near Magenta Plaza in Lumiose City.
The Lysandre cafe.
get a pokemon, then you train it, get it really strong, and beat th ecrap out of all the 7th leader's pokemon. Its easy.
the best way to beat the 7th gym leader is with a fire type Pokemon
To defeat or "beat" the 7th gym leader in Pokemon sapphire there twins and they have a solrock and a lunatone to beat them I suggest about level 40-50 water types.
Yes, after you beat the 7th gym leader.
He will appear after you beat the 7th gym leader.
well first after you beat the 7th gym leader bill takes you there to the islands
Use a fire, fighting, or steel type.
read the question, "where is the 7th gym leader?" everything you need to know will be in there
For most of the colosseums, you have to beat 6 trainers, and then the 7th trainer you face will normally be that colosseum's leader
on cinnibar island beat the 7th gym 1st tho
i think you get to the underwater cavern after beating the 7th gym leader
go to the teAM GIGLATIC building and beat everyone inside