>>533695382
Stingmon is FAST, different rides have different movement speed

more interesting tidbit, you can load Digimon for EXP, but I'm not sure if the EXP boost is that significant, don't have any memories if it was any useful in the CS series
also you can exchange your mon for Zeny

>>533695938
yes, the symbol just shows the field, I didn't test it extensively

>>533697571
unfortunately not, Keramon can evolve into Dokugumon, though