Only One Attempt?
Then not to waste HC again :/
I think Lv20 Sinokotaraptor should help, Must Lv20 for tank reason, also reach required attack value.
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https://www.youtube.com/watch?v=6PrhkkC74JU
A respect for Japan Bro, and here's his video about the tower:
https://youtu.be/HcseyNjWwVI
I brought Dracoceratops to make the battle become more stable.
And the process:
Gamma + Puru to kick T.rex Gen 2, and Puru build up shield.
Puru + Draco to kick Para.
Draco be sacrificed on Pachy, then Dimo LW on Pachy (sacrifice)
Bring Puru and use ID to end the battle.
(In the end Pachy will receive 34% Counter + 66.7% DoT + a little damage from Dimo)
If Pachy first:
Swap-In Dimo and IPS (sacrifice)
Gamma kick Pachy by PP.
Next Gamma can trick on T.rex Gen 2,
Or RAR + Puru + Draco to take down Para, then bring Gamma back to kick T.rex Gen 2
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https://www.youtube.com/watch?v=mhiCYusawjc
Ludia add this ability to all crocodiles, Purrolyth, Purutaurus and Sdygidaryx:
When your opponent swap out, it can pin your opponent for 1 turn
And Carnotarkus doesn't get this buff.
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https://www.youtube.com/watch?v=QMN8NMXWHdY