What to do now after winning everything

In the game you get the poke-cell, a cell phone that allows you to contact every gym leader beaten and calls them for a rematch. Once beating Hoenn's elite four, you can now travel to SKY TOWER, which; with no more RAQUAZA in it, is now a place where gym leaders hang out for battles. If your lucky you might find a few elite four members here too. I'll explain the rematches with the Hoenn leaders soon, now what about the POKEDEX. In the game there are only 30 new pokemon. They are as follows
1. Llambra grass
2. Llambabra grass
3. Llambino grass dark
4. Flasnail Fire
5. Sluglash Fire flying
6. Escarlavago Fire Flying
7. Dewy Water
8. Dewish water psychic
9. Defairy water psychic
10. Skarmoron Steel Flying
11. Valvade fight
12. Machavade fight
13. Hitmonshi fight
14. Auralio fight psychic
15. Rosenight Poison steel
16. Navelink Water Flying
17. Abysneon Water
18. Shockarisu elec. fight
19. Eveon Normal
20. Metaleon Metal (STEEL)
21. Eartheon Ground
22. Seismire Ground Water
23. Lunukaracha (Lombre/ kukaracha) Water/ Fire
24.Houndevil Fire Dark
25. Chimeline Steel psychic
26. Kangaskorona Normal (baby kangaskahn)
27. Kangasking Normal/ Dragon
28. Eon Dragon
29. Lustrus Dragon
30. Omegrex Dragon
Now For Hoenn Rematches
Wattson
Menetric lv. 58
Magnazone lv. 59
Joelteon lv. 60
Shockarisu lv. 62
Electivire lv. 64
Electrode lv. 61
Brawley
Hariama lv. 65
Hitmontop lv. 60
Hitmonchan lv. 61
Hitmonlee lv. 61
Hitmonshi lv. 62
Auralio lv. 63
Norman
Eveon lv. 66
Kangasking lv. 68
Slaking lv. 65
Loppunny lv. 64
Swellow lv. 63
Linoone lv. 62
Roxanne
Tyranitar lv. 70
Golem lv. 64
Golem lv. 65
Probopass lv. 65
Steelix lv. 66
Rampardos lv. 67
Flannery
Macargo lv. 67
Magmortar lv. 69
Rapidash lv. 68
Torkoal lv. 67
Houndevil lv. 71
Escarlavago lv. 70
Winona
Skarmoron lv. 73
Staraptor lv. 74
Pidgeot lv. 74
Peliper lv. 75
Honchkrow lv. 79
Fearow lv. 76
Steven
Skarmoron lv. 80
Aggron lv. 81
Metagross lv. 84
Steelix lv. 79
Magnazone lv. 82
Empoleon lv. 80
Flora
Vileplume lv. 84
Bellosom lv. 85
Llambino lv. 86
Rosenight lv. 87
Jumpluff lv. 89
Sceptile lv. 90