Talk:Innocent Pokes Arale Norimaki/@comment-116895-20170514000426/@comment-28010522-20170514060927

here's another possibility,

in the fantasy world of Dr Slump and Dragon Ball, the technology for 100% efficient energy-waste and waste-energy conversions have not been found or created.

and/or, the creator of the Senbei and Arale intentionally/unintentionally 'forgot' to imagine the technology for 100% efficient energy-waste and waste-energy conversions, else he wouldn't be able to pull the pokey-pokey and poopy-poopy gags