Question

Do any Pokémon cards have HP or deal damage that isn’t a multiple of 10?

Answer 1

No
Bieng a usual buyer of Pokémon cards, I haven't found any card with hp or move not multiple of 10. This is probably so that there is easy calculation of damage and healing.
Hope I helped!
Source: experience

Comments

I checked in bulbapedia https://bulbapedia.bulbagarden.net/wiki/HP_(TCG)#List_of_cards_by_HP and no cards has a HP that can't be divided by 10.