Coronamon

Q:What does "by placing the top card of this Digimon [...] as this Digimon's bottom digivolution card" in this card's inherited effect mean, exactly?

A:It means that you place the top card of the Digimon with this card in its digivolution cards as the bottom digivolution card. For example, if you have a level 4 Digimon with just this card in its digivolution cards, you place that level 4 Digimon card under this card. This will turn this Digimon into a level 3 Digimon with the level 4 Digimon card as a digivolution card.

Q:This card's inherited effect placed a stacked card under this Digimon's digivolution cards and increased my memory by 2 when another copy of this card was in this card's digivolution cards. Can this be repeated to give me infinite memory?

A:No, it can't. A record of activation remains for the inherited effect's [Once Per Turn] even if this card stops being a digivolution card, so it can't be activated twice in the same turn.