The natural scarcity of the Aquapolis set, combined with its age, has made it a very desirable set in the modern age of Pokmon TCG collecting, and just like most releases from that decade, it's considered one of the holy grails in the collectibles space at the moment
Or Maybe You've Had Your Eye On Some Certain Cards
art is that it's overdesigned, while other cards like Penguin Soldier seem half-baked
The same then followed for the trainers, rares down to commons, and finally the energies at the end
This many years later theres nothing to go on that I can find besides opinion
This card provides a cool way for Creature decks with lots of Creatures that share a type to essentially polymorph small Creatures that deal combat damage into something else