The deck above is created by Kinopota-san, from Japan. This is the other profile that is quite a common build for Grandiskuwagamon in BT9. With the fully "insectoid" Digimon are used from LV3 to LV6, it seems like a very straightforward or predictable if you are playing against them.
There are some techs in this deck that it can either help to check faster or control the board better. The LV5 Okuwamon can be built in the raising area, then move out to digivolve into Okuwagamon-X, put an X-antibody option card under this Digimon digivolution source, declares attack and evolve into GrandisKuwagamonX for 3 costs (reduced 1-cost from OkuwagamonX effect).
The best thing of the GrandisKuwagamon is that "it can change the target when it is attacking", it may change the target to attack the opponent's Digimon that just got suspended when Grandis digivolves to earn back many more memories from tamers or from other Digimon's inherited effects. It still can do "piercing" with "SecurityAttack+1" if BT1 Kokuwamon is in its digivolution source. There is a chance that it may still stay in its turn after gaining back memory, unsuspend itself at the end of the attack and declares another attack to opponent's Digimon or security. GrandisKuwagamon with 16000DP is safe to check if it hit opponent's Digimon in security except for Imperial Paladin Mode and Alphamon Ouryuken.
If this Digimon is able to survive after attacks, if there is a need to destroy another opponent's Digimon in the board, then it is time to use Grandis Scissor.
Green Grandis Kuwagamon is strong, but Alphamon is even stronger in BT9 meta. So I think it is fine.