Generally speaking, the cards in Pokmon TCG Pocket have lower HP and attack strength than their counterparts in the main Pokmon Trading Card Game
It only costs one generic mana and one Green, making it trivial to cast
I am not sure between 2nd Trawler and 4th Krasis and it largely depends on the expected metagame but as I explained above I think that in a deck that digs so many cards having more options is better
Baloth Prime is a slightly nerfed but also cheaper Titania, Protector of Argoth, and it sometimes even attacks as a 10/10
The Blossoms was so good it made the cut in Standard decks during its era for tapping to bounce with Tradewind Rider in both Trade/Geddon that bounced lands after casting Armageddon or with Awakening in TradeAwake to tap and untap
Special Illustration Rare cards exist for Charizard ex [Pokemon 151], Blastoise ex [Pokemon 151], and Venusaur ex [Pokemon 151] too