-Seaking, Ghastly and Crobat are REALLY big -Porygon looks bigger than it's evolutions (So does Bellossom, it should be bigger than Oddish at least) -Nidoking, Arbok and ESPECIALLY Torterra are too small compared to the trainer.
IMO, Torterra is the biggest offender. It should be the size of Groudon or something on that chart, to the point where a trainer could actually sit underneath the tree on its back.
Porygon being larger than its evos makes sense. As technology gets better, things become smaller and more compact. Look at computers in the 40's, then look at computers today.
I think that the sizes are just fine. Overall, Pokemon uses a more realistic scale for Pokemon. Most animals in real life aren't ridiculously big. The largest terrestrial vertebrate is the African Elephant, with the largest recorded specimen being 13.1 feet tall.
R.I.P. Pokemon Cycle Fact: Things are so much better when taken at face value.
Everything is a joke compared to Wailord, the funniest of them all is if you compare Kyogre to Wailord. Gyarados is so small compared to Onix... Dialga, Palkia and Giratina are giants compared to Reshiram, Zekrom and the dwarf Kyurem. Most of all first gen pokemon tends to be more 'pocket size', then they start to grow with each gen