The characters have not changed very much from DOA4 to DOA5. The animation has gotten slightly better and some of the characters have been able to adopt other characters moves to add to their arsenal. The main changes from DOA4 to DOA5 are environmental elements of the game.
No. Alpha-152 is not an unlockable character in DoA4. You can only unlock Ein, Gen Fu, Tengu, Leon, Helena, and Spartan 458.
"There are tons of upgrades for these cars. Some include: trim upgrades, headlight upgrades, fuel return pipe upgrades, as well as transmission upgrades."
DOA1: Kasumi DOA2: Hayabusa DOA3: Ayane DOA4: Zack
you can have a solar powered keyboard
Some mild upgrades can actually lengthen the life. It's the major upgrades that can shorten the life.
Vaulting items are a good way to get upgrades. You cab get bonuses such as +6 energy, +2 stamina, and +5 defense by vaulting items.
There are many companies and websites that offer upgrades to RAM memory. Some of these companies that offer upgrades are Best Buy, Crucial and Amazon.
There are some firmware upgrades for cameras, but you usually have to send the camera back to the manufacturer, unless it's a pro or semi-pro camera.
Practice Sword Goddess Sword + Upgrades Slingshot + Upgrades Beetle + Upgrades Butterfly Net (I know) + Upgrades Bomb flowers Gust Bellows Whip Clawshots Bow and Arrows + Upgrades
Some cost effective upgrades would be an air intake and upgraded exhaust. You can normally find good deals online.
the modern upgrades are that they have security improvement with detectors.
Getting free flight upgrades can be difficult, but some strategies include joining loyalty programs, flying during off-peak times, dressing nicely, and politely asking at check-in or at the gate. It's important to remember that upgrades are not guaranteed and depend on availability and the airline's policies.