Andre wants Delphox hehe...something about a man in a skirt! XD 

Dante needs a 500+ BST Pokemon to match up with, as well as a 600 BST one. XD I proposed Blaziken above as a BST 530 for Dante...with Speed Boost of course, and Salamence as his 600 BST. XD Mega Houndoom is actually a Special-inclined Mega...closer to Andre's stats than Evie...strangely. XD Alright...we'll all match each character one [i]500+ BST[/i] Pokemon, one [i]600 BST[/i] Pokemon (Legendary or Pseudo) and one [i]Mega[/i] (regardless of BST, as long as stat trends kinda match). Mega can repeat from either the 500+ or 600 one. XD

What matters is the relative stat trends...not exact, but should be close in terms of spread. XD

Andre: Jolteon/???/???
Selena: Milotic/Diancie/???
Dante: Blaziken/Salamence/Mega Charizard
Jayden: Carracosta/???/Mega Scizor
Evie: Weavile/???/???
Mira: ???/???/???
Cisrian: ???/???/???

Yup, of course Evie takes Froakie. XD My take is:

Jayden - Swampert
Dante - Charizard
Evie - Greninja
Andre - Delphox
Mira - Sceptile
Cisrian - Serperior 
Selena - Empoleon