flowers huh.
xerneas is basically a cross between a deer & a tree
yveltal is an overgrown cross between a crow, a eagle & the black death.
zygarde is a guardian snake
diancie is a fairy mixed with a ring
hoopa is a djinn
volcanion is a lion dog
yeah, i'd say some kind mandrake or fern flower would fit in well with that mix.
wouldn't be to surprising if the last main series game of the gen has a new legendary or legendary variation.
i wonder if that eternal flower floette counts as a legendary? it is the only pokemon confirmed to be immortal. others don't live with in the same time or space and others can extend their lifespans.
celebi's being brought back from nearly dying via many other celebi's reviving it for example.
then years later same plot was later used in dr. who "the time of the doctor" to save the doctor via the timelords giving him enough energy for another 11 incarnation cycle.