Terastallization in its current state is unbalanced and uncompetitive. I am confident that the discussion from this post will lead to that conclusion if it hasn't already. However, I am also confident in saying the majority of players here enjoy Terastallizing as a mechanic, even ones who recognize how broken it is. I think it is also necessary to keep in mind the subgroup of Pokemon Showdown players participating in this discussion. I wish I had a more elegant way of putting this, but think about what hearing only from this subgroup might mean.
With that being said, I think it is in the overwhelming majority's best interest to at least attempt a tier where Terastallizing is restricted before we jump to banning it.
What makes Terastallization an enjoyable mechanic?
The answer to this question should heavily influence how we go about creating restrictions for Terastallization. What is the point of restricting a mechanic if you kill the appeal of the mechanic itself? At that point, it would be more sensible and easier to outright ban it. We want to preserve the fun aspects of Terastallizing that are fun and push the metagame towards a more balanced and competitive environment. So what are the aspects of Terastallization should we aim to keep?
The surprise factor of Terastallization can be so exciting. It would be a mistake to ruin this aspect by showing what Tera type each pokemon is on preview. The ability to bait a check and remove it through Terastallizing feels amazing. The idea of holding your Terastallization adds a whole new layer to the mind games during a battle. The problem is that Terastallization is so unpredictable right now, even the best players cannot account for every possible situation that Terrastallization creates.
Therefore, we need to restrict the mechanic in a way that doesn't completely limit this surprise factor.
There are other aspects of Terastallization that make it a fun mechanic. For example, it has the potential to enable so many ideas in the teambuilder. You often have multiple viable options for your Tera-type on any given pokemon. It feels personal in a way. You can have your own unique playstyle. Tera Blast also enables pokemon with little coverage to become real viable threats.
My Thoughts on Current Proposed Restrictions
Showing Tera Types on Preview: Against
This proposed restriction sacrifices the fun aspects of Terastallization in exchange for balance. Boring. All this restriction will do is widen the gap between the strongest abusers and the rest. It would completely limit the creativity and skill expression possible. The whole layer of mind games added by holding your Terrastallization to bait your opponent into blowing needed checks for a late game sweep is removed. Baiting checks wouldn't even be possible.
Banning Tera Blast: Strongly Against
This is the worst proposal by far. It once again would widen the gap between pokemon who can abuse Terastallization and those who can't. This also heavily encourages the use of same type Terastallizing, which is, in my opinion, the most boring and arguably one of the less balanced aspects of Terastallization.
Limiting Tera Types to STAB Types: Strongly Against
Oh helll nah
Limiting Number of Pokemon Terastallization is Available To: Against
This proposed restriction would balance Terastallization and also keep the fun aspects to a degree. However, I feel like this restriction would force a meta where there are a handful of Terastallization abusers that every team will be built around. It would be a less viable decision to use Tera-Fire Hatterene because Scizor won't be on every team. You would rather just use an objectively strong abuser of Terastallization like Tera-Ghost Dragapult because of its consistency.
New Proposal
Remember, "we are working under the premise that if any restriction does get implemented and the mechanic still proves problematic afterwards, then at this point we would be far more likely to cut any losses and not try any further restrictions, but rather an outright ban". We need Terastallization to be balanced the first time around.
Limiting the pokemon able to Terastallize to one makes sense. It would reduce the brokenness of picking and choosing what Tera-type you need based on each game. While this proposal would do little to reduce the 50/50 mind games brought on by Terastallization, the amount of times these 50/50s can actually occur would be less. There are two issues this restriction brings though:
1. It overly encourages players to build around the top handful Terastallization abusers.
2. It still leads to impossible situations where you have no choice but to guess the opponents Tera-type. (Ex: You have a choice to revenge Chien-Pao with Scizor or Breloom. If it's Tera-Fire and you send out Scizor first, you lose Scizor. If it's Tera-Fairy and you send out Breloom first, you lose Breloom.)
I think that merging that merging this restriction and showing the Tera-type on team preview may be our best option. The catch is that you wouldn't be able to see which pokemon can Terastallize.
- It would preserve the aspect of unpredictability.
- Impossible situations wouldn't exist anymore either. No more 50/50s into Chien-Pao. If you have a Scizor and a Breloom, and their Tera-type is Fairy, you can be damn sure who you are sending out. And at the very least, you would have the ability to minimize risk.
- Seeing the chosen Tera-type but not which pokemon it's on means people need to get creative in the teambuilder. (Ex: Tera-Ghost as the chosen type. The team consists of Grimmsnarl, Cyclizar, Hatterene, Chi-Yu, Roaring Moon, Dragapult. Really Dragapult is the only abuser of Tera-Ghost here, but then as you go to revenge Roaring Moon, it Terastallizes. Another example: Tera-Fire as the chosen type, same team. The Tera-Fire dissuades you from bringing in Scizor on Hatterene. Instead, Hatterene is actually running Giga-Drain, and makes progress early into less-optimal checks because Scizor couldn't come out. Then, late-game, Scizor comes in to revenge Roaring Moon only to find out that it was the Tera-Fire pokemon.)
- Overall, I feel as this restriction balances Terastallization to a more competitive standard, while also preserving the themes of what makes Terastallization so fun. Sure, you can no longer effortlessly bait in a check that your pokemon had no business beating, but now you can bait your opponent in other ways. This change would open up a new level of complexity in games that would reward creative teambuilding and give more opportunities for skill expression.
This is not a finalized proposal by any means, but I do think this is heading in the right direction.