I definitely appreciate the gen 1 look you're going for, and also that it end up kind of dinosaurish like how people thought basilosaurus were reptiles, but people are right, you definitely need to distinguish it design wise more than being just a bara garchomp. Find some novel direction to take the design in. Maybe you could make it a little more alien looking, riff off of 60s-80s psychedelic space whale shit, give it an Aesthetic colour scheme with all those bright pinks, yellows, purples, etc. Make it seem like an alien-altered dolphin monster. Or, you could go harder in the basilosaurus direction, start as a dolphin but end up even more prominently dinosaurish, lose the garchomp colour scheme in favour of reptillian greens and browns, maybe work a little of the skull and ribs that they thought belonged to a great sea dinosaur into the body armour, with just the subtle flukes hinting at the true identity. Or you could go in the deep sea direction, base it on how sperm whales are the deepest diving mammals which hunt down in the lightless abyss, work in some vaguely submarine looking elements to the body armour, give it smaller eyes and a bigger top jaw, build it around sonar attacks. You could make it black and add some deep sea fish bioluminescence elements, would give an interestingly gigerish overall look with a sperm whale head shape. Hell, you could even make it a literal gorilla whale as a nod to gojira.
Lots of potential in a kaiju whale though! I definitely prefer this to the more whale like version you did, which was just an orca with extra greebles added. Always love classic gen 1 kaiju type fakemon, looking forward to seeing you refine it more.
