!czar

Reason #1 Czar Dragon is a terrible fight - Czar Dragon hovers up and down, making it really difficult to Super Jump on him.
Reason #2 Czar Dragon is a terrible fight - Czar Dragon causes random misses for normal attacks.
Reason #3 Czar Dragon is a terrible fight - Czar Dragon and Zombone both have ridiculously broad ranges for how long their normal attack animation takes, making them very difficult to perfect block.
Reason #4 Czar Dragon is a terrible fight - Czar Dragon has a fear-inducing move.
Reason #5 Czar Dragon is a terrible fight - Czar Dragon summons fireballs upon normal attacking or using Iron Maiden that waste a lot of time if they take their turn, forcing you to equip the Amulet to a party member in order to be able to kill them & thereby leaving an extra character vulnerable to Iron Maiden.
Reason #6 Czar Dragon is a terrible fight - Czar Dragon and Zombone both have a 50% chance of counterattacking any normal attack.
Reason #7 Czar Dragon is a terrible fight - Czar Dragon's Water Blast will OHKO both Mallow & Geno unless you want Mallow to do less than 350 damage to the Ding-A-Lings with Thunderbolt or you want to give Geno 4 HP bonuses, hindering his firepower.
Reason #8 Czar Dragon is a terrible fight - Unlike EVERY other fight in the game, there is a mysterious extra amount of waiting time between characters' actions throughout the entire fight, making it more costly for the fight to take extra turns.
Reason #9 Czar Dragon is a terrible fight - An optimal Zombone phase requires Mallow & Geno to be alive at the start to attack once each AND Mallow needs a weapon equipped in order to do enough damage; this requires you to risk getting more big coins during the Bean Valley vine climb, or otherwise waste more time using Shocker instead.
Reason #10 Czar Dragon is a terrible fight - Zombone's spells are so powerful that it is unsafe to only boost Mario's attack EVEN THOUGH Mario has both the Super Suit and Attack Scarf equipped.
Reason #11 Czar Dragon is a terrible fight - Bowswer & Mallow are both viable choices for 3rd party member in this fight (as well as the Axem Rangers fight afterward) depending on your Bomb count, forcing you to remember branching paths for equipping & item management.
Reason #12 Czar Dragon is a terrible fight - Truly optimal strats for Czar Dragon would include a Fright Bomb & multiple Ice Bombs, meaning that you can always save more time by getting more godly freebie luck.
Reason #13 Czar Dragon is a terrible fight - We still have no idea what the overall best strat(s) are.