盒子X和盒子Y里面有一些红色和绿色的笔。盒子Y里的笔比盒子X多90支。盒子Y里的红笔数量比盒子X里的红笔数量多30支。在盒子X中，绿笔比红笔多25支。盒子Y中绿笔比红笔多多少支？

1. Find the difference in the number of green pens between Box Y and Box X.

Since Box Y has $90$ more pens in total than Box X, and $30$ more red pens than Box X, the number of extra green pens in Box Y compared to Box X is:
$90 - 30 = 60$

2. Calculate how many more green pens than red pens there are in Box Y.

In Box X, there are $25$ more green pens than red pens.
In Box Y, the number of green pens increased by $60$ (relative to Box X) and the number of red pens increased by $30$ (relative to Box X).
The new difference between green and red pens in Box Y is:
$25 + 60 - 30 = 55$