Bigfin Bouncer Captain Howler, Sea Scourge Chrome Host Seedshark Daggermaw Megalodon Giant Shark Half-Shark, Half- Hammerhead Shark Loan Shark Pouncing Shoreshark Shabraz, the Skyshark Shambleshark Sharktocrab Spined Megalodon Tiger Shark, Abyssal Hunter Unruly Krasis Voracious Greatshark
Pichu will get one extra Lightning Energy per turn, which you can then move with Elemental Switch to Silvally
Yes, melded commanders like Brisela, Voice of Nightmares can deal commander damage
The mana-filtering was occasionally relevant, but it was everything else that the Whirza deck cared far more about
Here are photos for reference, and background on the original painting for anyone interested
whether thats the type of card, your goals, or just getting the best possible value