I find keeping these with others can work but provided its bottom dwelling fish, but id reccomend best of keeping in a specie's only tank, they seem to enjoy nipping at other fishies fins, For there size, 1inch ish max there aggressive, great fish to keep with alot of personality....I have a male and female in a tank alone still have not got giggy with it
The only fish I've tried with DPs are dwarf catfish - otocinclus sp. They are small enough and fast enough to get away from the puffs and hide. Mine are now fully grown and I wouldn't trust them with anything else. There's a saying that goes 'Never trust a puffer' and for good reason
I certainly wouldn't try them in a community tank personally.