WIP - It's good? But there seems to be a lack of research. I'll post my knowledge on her eventually.
WIP
Advent AliceType:
HeartAbility(s): Advent - Immune to secondary effects.
Weaknesses: Dream and Faith
Resistances: Ghost,Dark,Reason, and Heart
Base Stats: HP: 60
Atk: 60
Def: 60
Spd: 80
Sp. Atk: 100
Sp. Def: 150
Max Stats (With Beneficial Nature):HP: 324
Atk: 240
Def: 240
Spd: 284
Sp. Atk: 328
Sp. Def: 438
Min Stats (With Hindering Nature):HP: 261
Atk: 140 (112)
Def: 140
Spd: 176
Sp. Atk: 215
Sp. Def: 331
As you can tell, Advent Alice is a great special wall. It also comes with Reason moves to take care on pesky Miasma, Dream, and Faith puppets. (Which 2/3 ARE threats to it).
Offensive/Support -Advent Alice @ Leftovers/Lum Berry
Ability: Advent
EVs: 196 HP/156 Def/156 SpDef
Bold nature (+Def,-Atk)
- Heal Bell
- Mana Burst
- Signal Beam
- Toxic/Will-o-Wisp
Obviously taking advantage of her special defense, I've concocted support wall that will inflict status and heal off status problems to all party members as well as being able to dish out decent damage.
Stall/Support -Advent Alice @ Leftovers/Lum Berry
Ability: Advent
EVs: 252 HP/4 Def/252 SpDef
Calm nature (+SpDef,-Atk)
- Mana Burst/Heal Bell
- Wish
- Detect/Heal Bell
- Toxic/Will-o-Wisp
A slight variant on the offensive set. This will help you on puppets like Yoshika, who is a pretty good wall if you aren't prepared.
(Obviously you can't have two Heal Bells, but if you decide to use Mana Burst, you could use Heal Bell instead of Detect.)
Counters: Pretty much anything with a super effective physical attack can bring her down in one or two hits.
Attack Reimu primarily due to it's Dream type and Dream attacks. Sendai could also due quite a number on her as well. Speed Yorihime as well with her high speed and to Sacred Fire. Technical Ichirin is another threat due to it's Faith/Dream typing [/i]
Other options:Advent Alice can access move such as Baton Pass, Substitute, and Curse, so you can alternatively run a her in Baton Pass team.