Air, of course!

Air.

Air and/or Helium.

Slime is my favorite, with milkshake being a close second~

Air, water, magic, blueberry juice, helium and acid-base reactions.

I'm a big advocate for slime myself, but really anything dense or weighty is good in my book!

air, helium, water, blueberry juice, and magic

Air or helium. Magic is fun too

Water, slime, magic and food

Mostly air and helium, sometimes magic

In no particular order, my preferences are air, Slime, Spugizakom, water, and faaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaäaaaaAaaaaaaat!

Water. 🌊

I prefer water.
Very fun when a character is heavy and sloshy.

Gotta go with something super underrated like whipped cream or soda!

Cum, Blueberry Juice and then living Slime, anything with weight really because I imagine even if your the same size as someone filled with air you FEEL bigger^^

Diet coke while taking mentos.

air or water

Water, magic, and cum

Magic is a personal favourite of mine. Changeable limits and huge expansions

All.

slime is awesome, a material inbetween solid and liquid matter, it can be living or just a substance.

Air

take a look at my icon and guess :)

All of the above.

Cum because then you're also making someone else feel amazing.

Any gaseous substance works for me!

A Balloonosaur can theoretically take in an unlimited amount as they can grow skin rapidly as needed, and there are no documented cases of one having ruptured from inflating alone.

Air/gas, especially with an air pump or a gas tank

I think viscous slime would be good, sort of a nice slow-burning experience, maybe relaxing even; steadily getting heavier, gurgling and groaning as every inch of you fills up, and bulging with squishy softness while becoming like memory foam to the touch~ Fun/comfy for someone else to play with or lounge on, too~

But of course, cum is always special
Fully submissive to someone's lustful desires, immobilized and helpless to stop yourself from bloating as they thrust into you and pump you full of their own warm, liquid pleasure; reduced to their personal oversized condom as they milk out a long, satisfying orgasm into you, humping and eagerly using your body relieve all of their pressure, nothing to do but keep swelling up bigger and bigger until they finally finish and pull out... or until your ballooning body finally runs out of elasticity, and all that cum and pleasure surging inside just forcefully blows you up and coats the whole area in a warm, sticky mess... Being on either end of that arrangement seems gratifying to me, I wonder if a certain raccoon prefers one position or the other~?

My top three are cum, farts and berry juice.

Mmmm well I was always curious about magical inflation ^^

They're all pretty great. I like the sloshy-ness of things like water and cum. I think my personal favorite is berry stuff though

Depends on the mood, but top choices have to be:

#1: Maple Syrup
#2: Magic
#3: Goo / Slime
#4: Blueberry / Fruit inflation
#5: Food Inflation: Like donnuts filling, milk / heavy cream, etc

Any liquid. The thought of it sloshing around inside you as you try and waddle away or as your swaying side to side...🥰

Air, water, or carbonation!

air, helium, water or the clasic soda and mentos. Size? planet size is the goal.

Air, Water, Soda, and Cum

All of the above

Water! It keeps all advantages of the inflation, but also gives you a heft, weight and feeling of mass!