Shadow Mirrors are definitely a viable concept. We already have a Selena reserve, who is heavily implied to have connections to Shadow Mirrors. Although it's unlikely Shadow Mirrors will actually attack SRWU-verse unless someone apps Axel or Lamia.
A Shura character might be problematic though, unless someone apps a canon Compact 3 character (most likely Folka).
Regarding Banpresto OCs: if it's an original character who uses a relatively common Banpresto unit (such as a Gespensts or a Lion) or an original one, and comes with their own storyline - then there are no problems, they count as a standard OC as per app rules. If they were to be involved with some part of Banpresto original plot (for example, an OC who has ties with the SRX team, or the SRW D originals), then that plot must be present in the game already, and you need permission from its players for the app to be approved - as is the case for other "canon OCs".
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Date: 2014-03-30 09:52 pm (UTC)A Shura character might be problematic though, unless someone apps a canon Compact 3 character (most likely Folka).
Regarding Banpresto OCs: if it's an original character who uses a relatively common Banpresto unit (such as a Gespensts or a Lion) or an original one, and comes with their own storyline - then there are no problems, they count as a standard OC as per app rules. If they were to be involved with some part of Banpresto original plot (for example, an OC who has ties with the SRX team, or the SRW D originals), then that plot must be present in the game already, and you need permission from its players for the app to be approved - as is the case for other "canon OCs".