Venusaur has a really strong ability. Sure it is on a stage 2 and requires a coin flip, but it's Boss's Orders and 10 damage (and sleep) from the bench potentially every turn, and I imagine you're running more than 1 copy so if you get multiple out you increase the odds of it working.
Radiant Venusaur's ability can't be used in every deck, but the ones that can it's absolutely amazing for and the attack isn't awful either with Gardenia's Vigor to take out things like Miltank.
Charizard has a lot of potential for support, but also has a respectable attack. It's not as strong as Roaring Resolve or Leon Charizard in that it can't OHKO VStars or VMAXs, but it's a lot less clunky than the latter and again can support other Pokemon's attack costs.
Radiant Charizard is "What if you didn't have to waste Magma Basin turn after turn on Radiant Heatran?", but with a lower damage cap, but just enough to OHKO a VStar after a belt. The most noteworthy downside to Radiant Charizard is getting scuffs on it when using it IRL, since it'll be worth a lot (if not immediately, then in 3-10 years).
I don't really like Blastoise's ability. On one hand, accelerating 6 energy from your deck, not just water or basic energy, is absurdly powerful and obviously needs a drawback... but on the other hand your turn ends and it's on a stage 2 meaning outside of Expanded you're not using it until turn 3, further meaning you don't even get to take advantage of it until turn 5. I guess you can use this with Dialga VStar and Diancies since the ability works from your bench, especially once Metal Saucer rotates? In Expanded you can also cheat it out via Archie's Ace in the Hole, but I'm not sure it's worth using over Electrode GX, which while that gives your opponent prizes you can still attack with your degenerate strategy the same turn you accelerate the energies.
Radiant Blastoise makes me sad because of the ugly pee splash background art and because the water energy discard cost means it can't breathe new life into Jolteon VMAX after Tantrum Zigzagoon and Shady Dealings rotate... but outside of that it's still extremely powerful since it's on a basic, even if it can only ping the bench it can set up the opponent's next attacker or a boss target for an OHKO. Once again the attack isn't bad by any means either for a basic 1 prizer, though I imagine you'll only use it in a pinch or to mess with the prize trade.