Rulings
Q1: If this Digimon is in play, can I move one of my level 3 or higher Digimon from my breeding area to my battle area with BT1-089 Mimi Tachikawa's effect?
Yes. Moving a Digimon out of your breeding area does not count as playing a Digimon.
Q2: If this Digimon is in play, can I activate effects that reduce play costs?
Yes. Effects that only reduce play costs can still be activated. Effects that reduce play costs AND play Digimon can’t be activated.
Q3: Does this card's effect also prevent me from using Option card effects to play Digimon?
Yes. Option card effects are effects just like any other, so you can't use them to play Digimon.
Data Sources
EN
Official English Card Listworld.digimoncard.com
Lv.3 Pomumon BT9-047 C Rookie | Data | Vegetation [All Turns] Players can't play Digimon by effects.
A
Official English (Asia) Card Listen.digimoncard.com
Lv.3 Pomumon BT9-047 C Rookie | Data | Vegetation [All Turns] Players can't play Digimon by effects.
W
DCG Wikidigimoncardgame.fandom.com
Lv.3 Pomumon BT9-047 C rookie | Data | Vegetation [All Turns] Players can't play Digimon by effects.
JP
Official Japanese Card Listdigimoncard.com
Lv.3 ポームモン BT9-047 C 成長期 | データ種 | 植物型 【お互いのターン】お互いは効果でデジモンを登場できない。