You can do this by looking at the top performers in recent Regional Championships and World Championships, or by speaking to people at your local card store to get some advice on which decks are best right now
By incorporating Turtonator and Kiawe, it is possible to play aggresively while also having an answer for Pom-Pom Oricorio
No, digivolution costs can't be reduced to less than zero
Its a pretty good token producer if it survives combat
Keep in mind however that it should only be played in an ally heavy deck with more ally-support cards like Charisma, Inspiring Presence and especially Calling in Favors, it happens that Trusted helps your allies stick around and those other cards all depend on allies sticking around until you get an opportunity to heal them, swap them around or fill your board with them
This game is featuring Joey Wheeler as the opponent, adds new cards, new dueling choices, new dueling options and more Decks for the opponent, making this the Power of Chaos game with the most content