Echidna

Echidna is encountered as the level boss of Mission 7 then becomes part of the boss rush in Mission 19.

• This fight is consistent. You must CS'3 → EX3-Calibur → Roulette Spin/Aerial Combo while she's coming down. Failing to do that will cause her terrestrial state delayed with Tail Wagging.
• Worst case scenario is when she performs Dragon Charge. You can stop this pattern with DT transformation but she can choose to ignore it sometimes.
• According to this test CS'3 x2 with Combo A spam → Buster is the fastest method to kill her. Although, if the EX-Charge mash wasn't good then she will have few HP left where CS'3 → Calibur should get the job done.
• Echidna in Mission 19 should always start with EX3-Calibur → CS'3
• Mission 19 cycle has risky approach where you can apply Showdown before Spamming Combo A Meaning you won't have enough time to react Echidna's attempt to knock you down which she can choose to do that early.
• Taunt Cancel Chimera Seeds at the end for DT to be avaliable on the last part of the boss rush

• ComboA (1,2) → Prop immensely helps with stunning Echidna due to multihit properties, whereas Reb Combo A deal a bit more damage.
• Don't forget to use Devil Star when DT-Gauge is almost 0.
• Holy Water has to be used when Echidna has atleast 3 bars of HP left.
• Be prepared to react Echidna's knock down attempt with Air Hike → Coyote-A shot