I play a lot of this bad boy, and I want to suggest some swaps below 3 USD for you to take it to a higher ground: First of all, the ramp
The likely answer to this question yes, but its important to keep in mind that not every Pokemon card is super valuable some hold their value better than others
Some effects can prevent creatures from untapping during an untap step
Creature - Merfolk Rogue Color tag templates(None) Uyo, Silent Prophet Flying , Return two lands you control to their owner's hand: Copy target instant or sorcery spell

Other printings of Mewtwo-EX $146.90 Mewtwo-EX Next Destinies $61.90 Mewtwo-EX XY Black Star Promos $34.05 Mewtwo-EX Evolutions $12.03 Mewtwo-EX XY Black Star Promos $10.70 Mewtwo-EX BW Black Star Promos $8.94 Mewtwo-EX XY Black Star Promos $12.22 Mewtwo-EX Legendary Treasures $11.23 Mewtwo-EX Next Destinies Most valuable cards in BREAKthrough View the full price guide $179.68 Mewtwo-EX BREAKthrough $145.69 M Mewtwo-EX BREAKthrough $111.31 Mewtwo-EX BREAKthrough $109.98 M Mewtwo-EX BREAKthrough $72.33 M Houndoom-EX BREAKthrough $43.10 Mewtwo-EX BREAKthrough $40.42 M Mewtwo-EX BREAKthrough $34.74 Brigette BREAKthrough More cards by Ryo Ueda $629.99 Espeon ex Unseen Forces $522.21 Umbreon ex Unseen Forces $466.58 Gengar-EX Phantom Forces $433.60 Celebi ex Unseen Forces $325.64 Dragonite ex Dragon Frontiers $283.50 Venusaur ex FireRed & LeafGreen $275.00 Articuno ex FireRed & LeafGreen $242.24 Ninetales ex Hidden Legends Discover Keep browsing Psychic typePsychic type Pokmon cards SetBREAKthrough Most valuableTop 100 Pokmon cards You might also like...

Though it may cost you in power, the great card pools for singleton formats often have a similar card that does what you only have one copy of, these can be your duplicates