The rewards for Solo Battles typically include Shop Tickets that you can exchange for Hourglasses, certain Cards, and other items
I suppose the actual play for Ukkima would be to protect it from targeted removal with Ghostly Flicker-type effects, but I personally hate a strategy that relies on my opponents interacting with my board
Meowscarada is also more than capable of handling the damage from Palkia or Arceus VSTAR , which gives you more than enough time to defeat them

Here's the list: Unlimited Tropical Island (PL) Tundra (PL) Revised Badlands (PL, LP, GD, EX, NM) Bayou (PL, LP, EX, NM) Plateau (PL, LP, GD) Savannah (PL) Scrubland (LP, GD) Taiga (PL, GD) Tropical Island (PL, LP, GD, EX) Tundra (PL, LP, GD, EX) Underground Sea (PL, GD, EX, NM) Volcanic Island (PO, PL, LP, GD) Foreign Black Bordered - German Badlands (PL) Foreign Black Bordered - French Badlands (LP) Bayou (PL, GD) Plateau (PO, PL, GD, EX) Savannah (LP) Scrubland (PL, GD) Taiga (PL, LP) Tropical Island (PO, LP) Underground Sea (GD) Foreign White Bordered - German Badlands (LP, GD, EX) Bayou (GD, EX) Plateau (PL, LP, GD) Savannah (LP, GD, EX, NM) Scrubland (GD, EX) Taiga (GD) Tropical Island (PL, GD, EX) Tundra (LP, NM) Volcanic Island (PO, LP, GD, EX, NM) Foreign White Bordered - French Bayou (LP) Savannah (PL, LP) Scrubland (PL) Badlands (GD) Taiga (LP, GD, EX) Tropical Island (LP, EX) Volcanic Island (EX) Collectors' Edition Bayou (GD) 30th Anniversary Edition From the 30th Anniversary Edition also comes a Will-o-the-Wisp (Version 2, NM)

Through The Wormhole It may be a couple of years before Magic blasts off into outer space, but this drop lets you prep your Commander decks for that day with a series of staples with a stunning sci-fi style by Dani Pendergast
Poke Gold can also be used to purchase virtual TCG accessories