You might want to stop your valves a bit more.
From the way they are now, it takes only a slight bump for rapid deflation.

(after viewing next picture...)

Never mind.

The busy Lucario does not have time to deflate! Willpower keeps us moving! =^^=

(I generally don't retract the valves on my toys, less wear and tear. Plus with all the posing I was doing this day, it needed regular pressure adjustments. Honjyi has these new double vlves that are very nice. The outlet plug really does the job, and I found out how to "sabotage" the inlet to allow a slow leak for fine tuning pressure. Makes stuff like this a lot easier! )

oh...... the valves for the arm is located under the paw? my initial design have the valves located just under the armpit of lucario.... valves at the pawpads kinda ugly D:

Ah, that makes sense. I wanted valves on the hips, I did not know that there were valves on the arms as well. I initially thought there were no arm valves at all. When they saw my drawing for when I repositioned the valves, I think they took the line I drew in one view through the arm to mean that I wanted the valve actually on the arm. Heh, I made sure when I got Renamon redesigned, that there were no valves on her arms period!=^^=

I really can't complain, I have the valve extended here, but retracted it blends in with the black behind the pawpad, and does not interfere with it at all.

I dunno if you might find this useful or not, I have a dirty trick on the new Hongyi valves where I poke a zip tie in, then loop it back up through the plastic part. I cut off the excess tie. the zip tie then causes a slow leak past the rubber flap without really altering it to allow for a more controlled bleeding off of air. Closing the central flap makes things airtight again! I'll need to post pics of this to clarify it... Makes playing with posing a lot easier! =^^=