Board Thread:Questions and Answers/@comment-38667967-20200226210220/@comment-39813813-20200227055102

The line いいや! 限界だ押すね!今だッ! pretty much had the same reading except the 1st word had 2 I's

The translation for "I-I did it! it activated!" is やっ! やったぞッ！ 発現したぞッ！ (Ya! Yattazo! Hatsugen shita zo!)

For good measure, when he says "I returned", 戻ったぞ is read as "Modottazo"