These type symbols are used in other areas of the Pokmon card to signify: The type of energy cards you need to perform an attack What typing the Pokmon is weak against What type the Pokmon is strong against The type of energy cards needed to retreat the Pokmon Colors and symbols are both used to denote type and you can see color alone isn't used to convey meaning
If truly sealed ones could be found, those would surely top this list with ease
Of course, theres a chance the design team went a completely different avenue with this
Nonetheless, it does seem like anything that draws attention to a particular Pokmon or set can have a knock-on effect on prices, and we should expect the Kanto bunch to be in the spotlight for the next 10 months
Similarly, for this creature to be used as a material for a Special Summon, the other monster could not be level 4
Incapsula incident ID: 1813000671187947502-435669997882511598