YOU SAID:
A Goomba that has been through airborne training.
INTO JAPANESE
空中訓練を経たグンバ。
BACK INTO ENGLISH
Gumba has undergone aerial training.
INTO JAPANESE
グンバは空中訓練を受けています。
BACK INTO ENGLISH
Gumba has received aerial training.
INTO JAPANESE
グンバは空中訓練を受けています。
BACK INTO ENGLISH
Gumba has received aerial training.
That didn't even make that much sense in English.