I felt this was a fairly okay entry in the series. The funniest part was probably Yoshi making a roar like Godzilla at the beginning. It was somewhat interesting to get into the characters' heads and understand what was going on. I liked how you used faces from the BBS moods in the bomb. What I did not like was that there was barely any action at all and it's not a good idea to have an entire episode of nothing but talk. Talking is great, but doesn't make up a whole chapter.
I do not understand how this was supposed to be a comedy/parody. It didn't even seem to have a point in using Mario characters with a Metal Gear theme. It actually would have worked better if you had made it to be more dramatic. Meryl sure looks funny in this. The animation is fairly decent even if the characters look a bit goofy.