Do you guys ever think about how Pokemon compare size-wise to similar real-world animals?

Take Seviper here for an example. An 8ft, 100lb snake would be as big around as a literal tree trunk to get that weight-to-length ratio. Even the thiccest snakes in that general size-range, blood pythons, don't get that heavy at that size; Burmese Pythons don't even get that big at 11ft long. And on top of everything else, Seviper is venomous, too. It's more like a legless Komodo Dragon than a snake, with the added bonus of being dangerous at both ends thanks to it's bladed tail.

What are some other pokemon that would be absolute nightmares to keep if you really size them up? (Given that this goes for most of them, just pick your favorite.)