My favorite gym leader is Norman. Even though people say he is hard I believe I beat him on my first try. In the Hoenn games, he is the protagonist's father as well. And since he is a gym leader, he of course can be battled in the Hoenn and World Leaders tournaments in Black 2 and White 2.
His Pokemon are: Ruby/Sapphire Emerald Hoenn Leaders Tournament
Slaking Lv28 Spinda Lv27 Slaking Lv50
Vigoroth Lv30 Vigoroth Lv27 Spinda Lv50
Slaking Lv31 Linoone Lv29 Kecleon Lv50
Slaking Lv31 Castform Lv50
Exploud Lv50
Zangoose Lv50
Type Expert/World Leaders Tournament ORAS
Slaking Lv50 Exploud Lv50 Vigoroth Lv28
Ambipom Lv50 Sawsbuck Lv50 Slaking Lv28
Bouffalant Lv50 Staraptor Lv50 Slaking Lv30
If Norman were a Champion, this would be his team:
Ambipom Lv52 Bouffalant Lv54 Exploud Lv57 Stoutland Lv56 Linoone Lv58
Slaking Lv60
His Pokemon are: Ruby/Sapphire Emerald Hoenn Leaders Tournament
Slaking Lv28 Spinda Lv27 Slaking Lv50
Vigoroth Lv30 Vigoroth Lv27 Spinda Lv50
Slaking Lv31 Linoone Lv29 Kecleon Lv50
Slaking Lv31 Castform Lv50
Exploud Lv50
Zangoose Lv50
Type Expert/World Leaders Tournament ORAS
Slaking Lv50 Exploud Lv50 Vigoroth Lv28
Ambipom Lv50 Sawsbuck Lv50 Slaking Lv28
Bouffalant Lv50 Staraptor Lv50 Slaking Lv30
If Norman were a Champion, this would be his team:
Ambipom Lv52 Bouffalant Lv54 Exploud Lv57 Stoutland Lv56 Linoone Lv58
Slaking Lv60