Mega Wailord is a lot larger, longer, and slimmer than base Wailord. I made it look and feel similar to Basilosaurus, hence the “teeth”, claw fins, and it being more serpentine. Some orca inspiration in there too, especially the head. It is also mimicking a bit of Kyogre with its tail ‘spikes’.
If you know Monster Hunter, it is basically Ceadeus. When it Mega Evolves, it is very unaware of its surroundings and would smash its iron head or its body on anything which would cause earthquakes that can be quite devastating.
by Positive_Way_8051