Your search for "Toon Mermaid RP01-EN063" revealed the following:
Toon Mermaid - RP01-EN063 - Common from Retro Pack, available at 401 Games Canada. Rarity: Common Card Text:This card cannot be Normal Summoned or Set. This card can only be Special Summoned while you control "Toon World". You can Special...
Toon Mermaid - MRL-072 - Ultra Rare - 1st Edition from Magic Ruler 1st Edition, available at 401 Games Canada. Rarity: Ultra Rare Card Text:This card cannot be summoned unless "Toon World" is on the field. This card cannot attack...
Toon Mermaid (2020 Date Reprint) - RP01-EN063 - Common from Retro Pack (2020 Date Reprint), available at 401 Games Canada. Rarity: Common Card Text:Cannot be Normal Summoned/Set. Cannot be Special Summoned unless you control a face-up "Toon World". Must first...