They have a lot of battle tricks, and effects that trigger when they tribute an Abyss Actor Monster
You choose people to talk to or duel with on a map, and then you get down to it -- after the bizzare characters smack talk on how they're going to beat you, such as "My Insect deck has been reinforced beyond your wildest imagination!!!" Upon starting the game, you'll be greeted by a screaming anime announcer who informs you that you're in "Battle City" and will be battling fellow duelists
Indeed, when you have a good opening hand and the opponent doesn't, you can win easily 3-0, or the situation can revert itself leaving you unable to even land a blow on your opponent's Digimon
Then, whenever you cast a spell of the chosen type, you get to create a token of that card
I acknowledge that its frustrating to have an effect that opponents cannot interact with, but (much like Partner ) Im (mostly) fine with it
Unsurprisingly, Charizard's card was the most popular and also capitalized on the TCG's powerful "ex" mechanic that's endured even halfway through the 2020s