Whenever someone makes a tier list, Yoshi is always at the bottom.
I don't really mind that much because then you can brag about beating a person with bottom tier, but where do you think he actually belongs?
I would say mid.
NOTE:I'm actually going to try and say this by being as little of a **** as possible.
Because using actual Data which Tier lists are based on...... where else could we really put him?
His tournament results are bad, and in the summer rankings he hasn't even PLACED yet while characters even worse than him have (CF >_>). And before you bring in the "Well that's because no one uses him" argument, That's the fault of the Yoshi community. Perhaps they need to step their game up, come to tournaments and show us how good Yoshi really is instead of the boatload of the whining that goes on when he's placed at the bottom of a Tier list, or maybe Yoshi really is that bad.
The thing is, how can we honestly think he's good if you guys don't put out in the Metagame?
His Matchups are bad, and before you ask yes, I do say this from the Matchup chart COMBINED with my own personal research/insight and some from intellectual posters. Even if you changed all of his disputed even matchups to advantages, he'd still have worse matchups than a wide majority of the characters in the game. In terms of relaivity, in terms of just showing which characters have good and bad matchups, that chart is fairly accurate for the most part.
Now as for the potential part.....does that really even matter until it's actually applied in the tournament scene? Hell look at Toon Link, he was looking to be pretty dominant, but what happened? He's barely placing like, at all (Altough granted, this actually might be a case where the simply underused argument is viable, his Matchups are great for the most part) Sure, all of can debate and discuss a character's strengths and weaknesses here, but what truly matters is that what happens when it's actually applied in a tournament setting. Sure theorycrafting is nice and can be very productive, but it's all moot if experimental and factual evidence proves otherwise. Take the ICs and Diddy for example, many thought with the Infinte Grabs that the ICs would become broken and maybe even Top Tier, but when you actually look at tourney results, the truth is shown that it's far from that, because simply the best of players know to not get grabbed and the fact that they are relatively hard to learn drives away others, keeping them from being consistently used. Diddy with his hax Nanerz mindgames was thought to be a very capable and possibly Very High Tier canadate, but again look at tourney results as of now, this doesn't seem to be the case at all. Now look at a character like Ike, I personally hate him with a burning passion, and think he's way too laggy and predictable to be of any use, but the thing is he's still placing relatively well aside from that. Now i'm not denying that these characters aren't good or bad, and in fact they are actually starting to rise/drop in performance respectively, but we cannot rely our opinions on just theorycraft alone, we have to see how these things actually play out in a real life situation and make judgements from there.
Bottom Line: Tier Lists need to be based on the Present, not the future
For what it's worth, I don't think Yoshi will stay bottom tier, and hopefully will rise to at least low. As a character in terms of potential he isn't all that great, but certainly not amongst the likes of Link Captain Falcon and Jigglypuff. But the problem is, you Yoshi mainers need to show us what he can do, not just be a no show and give us no choice for his common placing.