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That certainly makes a bulletproof case of not being in the S-tier.
I definitely see where you're coming from and the time does reflect the ease of use (fewer required heals, fewer required battles etc.), though I do think final level reflects the ultimate strength of the Pokémon so minimum...
Interesting and impressive! Especially considering the time you got which is virtually the same as the Gastly time even though you fought more battles. Which extra battles did you do to get to lv64 without sacrificing too much time?
Since I had a save just before the E4 where I still was low...
Tentacool
I did a casual Tentacool->Tentacruel solo run through the game the other day so I thought I'd do a proper Tentacool attempt following the rules in the OP.
NB: The run was made on emulator (VBA) for ease of use and ability to use several save states for experiments. Save states were...