Tested Rockman X5 voiceclips. Surprisingly, there are only a few voiceclips in boss battle.
1) Same as Megaman X5. Only Spiral Pegasus has the same voiceclip as Zero when using W-Shredder. The rest of the Mavericks don't have any voiceclip.
2) Dynamo missing 3 voiceclips in Megaman X5.
a) When he launches "D Blade", I think he shouts the name of the technique in Japanese. Something like "Shiraina"? Megaman X5 replaced it with Trick Shot's voiceclip "hu er".
b) Before he use "Earth Gaizer" in the 2nd battle, I think he said "Ikusei"? Megaman X5 replaced it with Defensive Stance's voiceclip "hur hur".
c) When he is defeated, he will said "ja ne" (see ya) before he warps out.
3) Same as Megaman X5, the battle against either Awakened Zero or Zero don't even have a single voiceclip.
4) Same as Megaman X5, the battle against Ultimate Armor only have "hey yah".
5) Same as Megaman X5, Sigma don't have a single voiceclip.
6) Same as Megaman X5, Magma Dragoon only left with "Hadoken" echo jammed in fire wave SFX.
The Prototype still has Magma Dragoon's X4 voice acting.https://tcrf.net/Proto:Mega_Man_X5
Also, you forgot to include Dynamo's intro name call during the 2nd fight.