Alan Davis had this character appear in his run of Excalibur, and she was always drawn pretty buff by him.  I can't find many pics on the web, but here's one example:

http://www.internationalhero.co.uk/c/cerise.jpg

Yes Megan becomes Hugely muscled , I recommend the he whole searis starting with issue 5 when she about to battle juggernaut! she starts drawing power from the earth For a super punch collect all the way pass the across time caper story line.
You see a sexy buff contantables, megan as a Muscluar Reptile, and Sue storm as a sexy she-thing, parody of dirty pair, Its great stuff,

I loved Excalibur. I always thought Meggan was so cute....

Cerise was awesome also....did you see the issue where she tore the guy's jaw off?