The more niche you are as a card, the more you push toward the middle of rarity and away from the ends (common and mythic rare)
The fact that Jaxis has a blitz ability gives it a way to shave two mana from its mana cost is mildly interesting but that seems more something for playing the card in tournament decks rather than Commander since commander tax would still apply to the alternate casting cost
It has now been one whole year since Pokmon TCG: Scarlet & Violet151 released, a set which encouraged me to start collecting Pokmon cards again after more than twenty years
So, in practice, it's like paying extra and getting a bonus just remember that, technically speaking, there are important differences between an alternative cost (like evoke and overload) and an additional cost (like kicker)
It's a pretty good card to use in battle as its Brave Slash does a whopping 240 damage
Based on the latest market prices tracked on TCG Stacked, Hitmontop is worth about $0.56 USD