Bergamo has the ability to absorb energy and grow his size based on the amount of his intake. He battles Goku in the Exhibition Tournament, who needs to go Kaioken Blue followed by a full power KHH in order to win. I'm haven't read this part in the manga, but the presentation of Bergamo here was really over the top.
Basil takes on Boo, and while he puts on a lot of offense, it's mostly Boo being squishy and taking everything until he gets pissed and ends it.
Lavender fights Gohan to a draw, using poison to blind and weaken him, but it should be noted that Gohan isn't anything special at this point, nor does he reach the level of his manga counterpart.