However, Giratina works best when used with a wall like Druddigon and support from Darkrai ex, so unless you have these cards already, it may be a better idea to go for Beedrill or Charizard , as their packages are more complete
Mox Ruby is third for Wheel of Fortune, Red Elemental Blast (due to blue being that good when you unleash the ancient weapons) and occasionally a deck of little red men and several variations on doing three damage for one or two mana

Sort Rarity Card Type Aggron #1Holo Rare $32.36 Beautifly #2Holo Rare $20.23 Blaziken - 3/109 #3Holo Rare $75.69 Camerupt #4Holo Rare $14.75 Delcatty - 5/109 #5Holo Rare $33.66 Dustox #6Holo Rare $16.56 Gardevoir #7Holo Rare $56.35 Hariyama - 8/109 #8Holo Rare $11.66 Manectric - 9/109 #9Holo Rare $16.88 Mightyena - 10/109 #10Holo Rare $26.33 Sceptile - 11/109 #11Holo Rare $81.07 Slaking #12Holo Rare $19.46 Swampert - 13/109 #13Holo Rare $60.99 Wailord #14Holo Rare $43.18 Blaziken - 15/109 #15Rare $3.98 Breloom #16Rare $2.10 Donphan #17Rare $1.90 Nosepass #18Rare $1.41 Pelipper #19Rare $1.14 Sceptile - 20/109 #20Rare $9.71 Seaking #21Rare $1.02 Sharpedo #22Rare $2.88 Swampert - 23/109 #23Rare $4.40 Weezing #24Rare $2.00 Aron - 25/109 #25Uncommon $3.01 Cascoon #26Uncommon $2.59 Combusken - 27/109 #27Uncommon $1.12 Combusken - 28/109 #28Uncommon $2.95 Delcatty - 29/109 #29Uncommon $1.41 Electrike - 30/109 #30Uncommon $1.44 Grovyle - 31/109 #31Uncommon $1.53 Grovyle - 32/109 #32Uncommon $4.03 Hariyama - 33/109 #33Uncommon $0.62 Kirlia - 34/109 #34Uncommon $2.23 Kirlia - 35/109 #35Uncommon $2.37 Lairon - 36/109 #36Uncommon $2.42 Lairon - 37/109 #37Uncommon $2.32 Linoone #38Uncommon $2.13 Manectric - 39/109 #39Uncommon $1.75 Marshtomp - 40/109 #40Uncommon $1.78 Marshtomp - 41/109 #41Uncommon $5.36 Mightyena - 42/109 #42Uncommon $1.82 Silcoon #43Uncommon $2.06 Skitty - 44/109 #44Uncommon $7.69 Slakoth #45Uncommon $3.31 Swellow #46Uncommon $1.27 Vigoroth #47Uncommon $1.42 Wailmer #48Uncommon $1.38 Aron - 49/109 #49Common $0.87 Aron - 50/109 #50Common $0.91 Carvanha #51Common $1.04 Electrike - 52/109 #52Common $0.61 Electrike - 53/109 #53Common $0.65 Koffing #54Common $0.74 Goldeen #55Common $0.58 Makuhita - 56109 #56Common $0.31 Makuhita - 57/109 #57Common $0.61 Makuhita - 58/109 #58Common $0.92 Mudkip - 59/109 #59Common $7.71 Mudkip - 60/109 #60Common $2.72 Mewtwo ex #101Ultra Rare $340.92 Lapras ex #99Ultra Rare $118.32 Scyther ex #102Ultra Rare $101.00 Sneasel ex #103Ultra Rare $85.59 Hitmonchan ex #98Ultra Rare $82.23 Sceptile - 11/109 #11Holo Rare $81.07 Blaziken - 3/109 #3Holo Rare $75.69 Chansey ex #96Ultra Rare $74.02 Electabuzz ex #97Ultra Rare $65.88 Magmar ex #100Ultra Rare $63.39

It doesnt boast the best rates, but Pack Point Exchange is a nice option to get a specific card in Pokmon TCG Pocket
Essentially, Pluto and The Robot Queen can work in tandem to deal multiple damages to your opponent every turn