Okay so I have a good and bad news.
The good one is that...
Finally, the last set of text is done!
「クッパさま。ないしょの
アジトが ばれたッス。
わるかったッス。」
「クッパさま、まけたッス。
わるかったッス。」
「ガ...ガウ...
(ひみつのみちが...)」
「ガ...ガウ?...」
「ふっ...。ひさしぶりに
おもしろかったぜ。ひみつの
アジトをおしえてやるよ。」
「ふっ...。ひさしぶりに
おもしろがったぜ。だがな、
これですんだとおもうな。」
And the bad news is...
I might be out for vacations during this month, so it might be hard for me to work on this project for a while. :/
I will try to do my best to continue during July, even if it is a tiny bit per day.
Also, one more thing...
I think.... Just THINK that there is still missing text for when each one of the enemies win against you.
I might be wrong though, but can somebody confirm this?
I will try it if I had a save file or a save state with all stages unlocked, since I'm not too good at this kind of games. xD
It took me 20 mins to defeat the Eggplant guy, take a hint hahaha.
Oh and also, I will ope up a Data Crystal page for Wrecking Crew '98 with everything I come across.

Starting with the TBL file which GHANIM has been so kind to share and correct.

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EDIT:
I saw that in some speedruns, if you beat a guy fast enough with some chain combos, you can get a pic of Bowser to appear in the side of the enemy with a text that says:
安全第一
Which stands for "Safety First" or something similar.
That's another thing to consider.