Agitha can juggle most sorts of enemies effortlessly with her YYX combo. There are only a few types that run unfairly through the beetle, but you can get around that by adjusting your own movement during the constant beetle spawning. Her YYYYX combo is a strong area attack and her weak spoint smash is probably the best in the game because it covers a big area and hits hard.
Nope, will never like her! I'll believe she's better than Tingle though as I haven't played as him to say anything on the matter.