Annoying Video Game Helper: Any pet who doesn't have the "Control Magic" skill but has multi-target spells. Control Magic prevents spells from hitting allies, so a pet not having it makes spells hurt you and your other pets in addition to your enemies. Especially annoying when the spell is fire or ice elemental, since getting hit by these spells has a chance to destroy a random item in your inventory.
Demonic Spiders: Cockatrices in Elona+ are dreaded by most players. Their Nerve Arrow attacks combined with their special action Eye of Stiffen can easily one-shot even a well-equipped high level character.
With sufficient amounts of hunting or luck, you can acquire a Rod of Domination. Use that to dominate a Gold or Silver (Platina in Elona+) Bell. Genetically modify it to boost its level and give it extra limbs, then give it a shuriken (one that preferably nullifies poison). Pick a fight with a monster that's stronger than you. Laugh when your new best friend cuts it to shreds.... Or just give one Lulwy's gift weapon, The Wind Bow. The ether won't affect it, no modification required, same results.
Playing the Betting Mini-Gameblackjack enough times will net you enough potions of cure corruption to trade/sell for anything a wandering adventurer might have. And then you can steal them back on top of that. (however, you'll need new potions as their base value changes once given the stolen flag.)
Once you get a deed of shop and high enough tailoring to mass-produce panties with a sewing kit, be prepared to increase your gold gain by several orders of magnitude. A small pile of panties will bring in around a million gold, while getting 100k before that was a struggle. This was severely nerfed in an Elona+ patch, which removes the ability to craft equipment with the sewing kit.
Genius Bonus: The Brontosaurus enemy in Elona+ spams Lightning Bolt. "Brontosaurus" means "Thunder Lizard".
Germans Love David Hasselhoff: Most Japanese Elona players loathe Elona+ and its creator, just mentioning it is asking for a Flame War in many Japanese Elona communities. It mainly has to do with the excessive anti Save Scumming measures and the story for acts 2 and 3 not being up to snuff and being even more Reference Overdosed than vanilla Elona. Despite the new content never receiving a full official translation (or perhaps because of this), this is not the case with western Elona players, who enjoy most of the new content from a gameplay perspective, and it's more popular than vanilla or omake Elona. It helps that the Fan Translation removes some of the gameplay features that were disliked by the Japanese community, and most don't care about the story and dialog all that much to begin with, and most of it wasn't translated for a long time.
Most Wonderful Sound: The small chime that plays when one of your stats or skills level up, and the three flute notes that play on a payday or when your potential improves.
Food has a random chance of being cursed, which causes you to vomit and become hungrier when eaten. Having to waste money and time on identifying your food to just so you can know it'll work as intended is quite annoying.
If you are wearing a cursed gear, you often teleport uncontrollably. It can happen anytime, so even basic tasks like talking to NPCs or picking up items can become difficult and frustrating. Furthermore, NPCs sometimes spawn with cursed gear, so they will periodically teleport around the map like the player with cursed gear.
From Elona+, hydration. It works similarly to hunger, although instead of dying, failure to hydrate your character will drain your stamina, slowing your character to a crawl. While it's intended to prevent you from spamming potions during combat, the end result is that you're forced to periodically waste potions in order to keep your character hydrated. It's to the point where there are mods to remove hydration completely.
An item was added later, the magaqua, that constantly hydrates your character and makes them count as being in water for the purpose of applying the Swimming skill bonus. The flipside, however, is that being hydrated will prevent you from drinking potions, forcing you to use the Marking (urinate) skill before doing so and potentially wasting a turn.
Squick: You can get pregnant even if your character is male. On top of that, you actually give birth to aliens, which are hostile NPCs. If your character is pregnant, you can cure it easily though, drinking poisonous potions (like the cheap dye) or vomiting will get rid of the nasty chest burster. You can also drink out of toilets.
Note that "pregnant" is a translation liberty, as the Japanese text is more like "Parasitized".
That One Attack: The final boss of Elona+'s Act II has the "Super Regene" ability which will instantly heal a large chunk of its HP and drastically boost its life regeneration once you damage it enough. Your best hope is to get it to just above the threshold that will make it activate the ability, and then activate as many buffs as possible before unleashing your most powerful attack so you can hopefully remove the remaining HP in a single hit.
The spin-off Elona Shooter provides examples of:
Game-Breaker: Gravity Gun, Gravity Gun, Gravity Gun. This Ball-Of-Death™ shooter is indispensable to getting the Chosen One medal The change in difficulty once you get this is so big, you go from struggling on the previous days to breezing through the following levels. A lesser extent is the Crossbow that could shoot through mobs, hitting multiple times on big targets, making Hunters a solid choice from the beginning.
