You held the device on its side. It was the size of an iPhone when closed, but when you pushed the buttons on the sides of the small box, two doors (previously undetectable up to that point) slid open from the front to reveal a small touch screen. A third screen rose from the top, displaying a 'loading' screen.
"This is called a pokedex," said one of your professors, holding an exact replica of your device in his hands. He opened it in the same manner, pressing on the two side buttons. "Once you put your information into the dex, it will take you to this screen." The professor plugged his pokedex into a computer, which projected both screens onto the wall for the whole group to see.
The top screen had six blank boxes, under a section labeled "Party Pokemon." The display box currently had no pokemon registered. Your professor smiled, and took out a pokeball, releasing a pidgey onto the desk.
"You may register pokemon like so," he said. He then aimed the pokedex at the pidgey and pressed the two side buttons once again. A red light scanned the pidgey, and a picture of it appeared in one of his blank boxes. He explained that the dex would hold information for all pokemon that you capture, and you can edit which pokemon it displays as your party pokemon manually.
He touched the box with the pidgey on the top screen with his finger, opening a new screen. This one listed the height and weight for the pidgey, as well as the moves it knew, the gender, and what level it was.
Exiting out of this screen, he showed how the badge system worked. In his palm he held a sample badge. He pushed a button on the bottom screen called "Badge Registration." This button exploded outward when he touched it, leaving a red target behind on the bottom touch screen. He placed the badge on the screen, and like magic the badge dissolved into the pokedex, much the same way a pokemon dissolves into a pokeball.
After the badge was absorbed, a new screen popped up, showing two TM's. "Each leader you face, if you face one, will have two TM's registered to their badge. You may select one of them." He clicked one of the TM's, and the pokedex beeped and returned to the home screen. Now on the left side of the top screen there was a "Badges: 1" button. He clicked it, pulling up the sample badge.
The touch screen at the bottom always displayed a QWERTY keyboard, as well as a button for TM/HM moves. He clicked this button, and clicked on the TM Roost that he had taken from the badge. He then aimed the pokedex at the pidgey and pressed the two side buttons once again. Light flowed in white sparkles from the pokedex to the bird pokemon, and just like that, the pidgey learned roost.
"Any questions?" he asked? Your pokedex prompted you with some questions.
"When you type your name in, your trainer card will pop up. Click yes to confirm it is you, and your information will be registered. Then, you are free to go."
NAME? your pokedex asked you.
((Picture the pokedex almost like a nintendo 3DS in structure, only both screens are touch screens! If you have questions ask "the professor."))