These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Zig & Sharko
Designated Hero: Sharko. In "Marina's New Friend", he forces Zig to masquerade as another mermaid, endangering his girlfriend, does the same thing in "Sharko and His Folks" because Sharko's parents do not accept of his Interspecies Romance, shaves basically everyone on the island and almost shaves Zig, and then uses him as a replacement for dorsal fin in Hair Story just to make a wig for Marina, openly flirts with Manic Mermaid in the "Manic Mermaid", despite that Marina is his girlfriend and they're probably engaged as well, in "Birthday Party", which basically means bigamy. Yeah...this list could go on and on. He is sadistic as well. Here's an example: in "Boo Hoo Hoo Hoo!" Zig decides to watch a horror movie with Sharko to cure him out of his hiccups. Guess what? While Zig and Bernie are scared, he actually laughs. It cures his hiccups. Want another? In "Goin' Home", Sharko cries at how he misses beating up Zig. Many people who sympathize with Zig hate him, and this troper too, because, well, HE GETS AWAY WITH EVERYTHING.