Does this card's inherited effect activate when an attack is performed using a "[Start of Your Main Phase] Attack with this Digimon" effect?
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Official Ruling
No, it doesn't activate. "Attack with this Digimon" effects aren't suspending by an effect, they're suspending by an attack. Therefore, they aren't considered to be a "When an effect suspends" effect.
Source: EX4-002 Kokomon