Q1: If this card is in my hand, and I have exactly 2 Yellow Tamers. Can I play this card with BT6-112 BeelStarmon's On Play effect?
Yes, you can. Hoewver, it cannot be taken from your trash by BeeleStarmon's On Play effect even if you have 2 Tamers.
Q2: If I use this card while I have 8 or more of my own yellow tamers and a EX2-003 Viximon in my Digimon's digivolution cards, will that card's inherited effect be triggered?
No, in that case, since the usage cost of BT2-099 Glorious Burst has been changed to 1, it is not considered that an option card with a usage cost of 2 or more was used, so it will not be demonstrated.
Glorious Burst BT2-099 R Reduce the memory cost of this card in your hand by 1 for each yellow Tamer you have in play.[Main] 1 of your opponent's Digimon gets -12000 DP for the turn.
Glorious Burst BT2-099 R Reduce the memory cost of this card in your hand by 1 for each yellow Tamer you have in play.[Main] 1 of your opponent's Digimon gets -12000 DP for the turn.
Glorious Burst BT2-099 R Reduce the memory cost of this card in your hand by 1 for each {{Colour|yellow}} Tamer you have in play. [Main] 1 of your opponent's Digimon gets -12000 DP for the turn. ---
グロリアスバースト BT2-099 R 黄の自分のテイマー1体ごとに、手札のこのカードのコストを-1する。 【メイン】このターンの間、相手のデジモン1体のDPを-12000する。