Tottoko Hamutaro Anime Dechu! is a direct-to-VHS OVA released on September 15, 1999. This was the first attempt at an animated adaptation of Hamtaro, and consists of four short episodes. 

The VHS was only released as a mail-order from the September 1999 issue of Shogakukan, and given away for free to Shogakukan staff with preschool children. 

(Source: Hamtaro Wikia)

GOSHO collection reveals the origin of the smash hit &ldquo;Detective Conan.&rdquo; 
&ldquo;GO&rdquo; into his world, and we will &ldquo;SHO&rdquo; you SEVEN romantic and exciting stories created by GOSHO AOYAMA. 
WAIT FOR ME (30 min.) 
A genius inventor, who is still a high school student, has a girlfriend two years older than him. One day, he invents a time machine and attempts to go two years back into the past, to become the same age as her. 
However, it is she who ultimately uses the machine to travel through time! 
TEN PLANETS IN THE NIGHT SKY (10 min.) 
Meet Baby Conan! 
Yukiko Kudo is looking for her missing husband. The only clue to find him again is to decipher a mysterious message left for her. Their baby, Shinichi Kudo, one who later becomes the famous high school Detective Conan, will at this age already be offering some important hints for her. 
THE WANDERING RED BUTTERFLY (7 min.) 
A handsome detective, Yusaku Kitakata, receives phone calls from a mysterious woman day after day, with a new case each day. He of course solves them one by one. But the biggest mystery is who is this mysterious woman? 
PLAY IT AGAIN (30 min.) 
Thanks to the mystical powers of a Cherry Blossom Tree, a 70-year-old man with a secret sword technique goes back into the past and becomes the same age as his granddaughter. While enjoying his youth for the second time around, he notices that a player is after his granddaughter. 
SANTA CLAUS IN SUMMER (30 min.) 
Keisuke, a young man of 17, accidentally activates the Earth Destruction System. The destiny of the Earth now depends on whether he can stop the system within 24 hours. However, suddenly amnesia strikes him and he forgets the pin number to stop the system. The time is running out... 
DETECTIVE GEORGE&rsquo;S SPECIAL CASE (30 min.) 
A girl is fleeing from men in black. She runs into a detective agency and discovers that the detective there is a super-miniature-size, cool dude. He risks his life trying to solve a case for this client. Will they come through in the end? 
MAKING OF DETECTIVE CONAN (7 min.) 
Do you know how to make animation? 
Everybody wants to see the workings of an animation studio. 
Based on the concept of Detective Conan, the three sub-characters visit the animation studio of Detective Conan. This episode will surely catch the hearts of Detective Conan fans! 
[The actual animation is also involved in this special.] 
(Source: TMS Entertainment, LTD)

Gekkou Kamen is retired on the moon, so his trusty motorbike returns to Earth to find a new hero to take over the job of defending the Earth from alien invaders.

The infamous bandit Harimao hid a treasure, and to retrieve it, Lupin and the gang must gather three lost statues. When the Nazi-like group Neo-Himmel make a run for the goods, Lupin reluctantly partners with the aging "double-O" MI-6 agent Sir Archer and his granddaughter Diana to gather he statues first. Can this unorthodox team bond well enough to see this mission through? Find out in the Pursuit of Harimao's Treasure!
 
(Source: Discotek Media)

Lupin swipes a ring from a New York auction, and Zenigata is hot on his trail... along with a gun-toting, former-KGB brute named Nabikov. Nabikov's boss is Cynthia, the lady in charge of the BOW: Bank of the World. Cynthia knows the ring is actually a guide to the location of a fantastic brooch once worn by conquerors of years past. The brooch, it is said, gave them special powers to become more than mere men and women, and make their marks on history. Can Lupin and his cohorts find the brooch before Cynthia uses it to make her own mark with bloody, international war? 
 
(Source: Discotek Media)

As a pair of towers in Tokyo are being prepared for their grand opening, there is a series of murders of people connected to the towers. Conan suspects that the mysterious Syndicate may also be involved.
 
(Source: Anime News Network)

Ran has a nightmare about her mother dying, but starts to remember what really happened involving herself, her mother, and her father from 10 years ago. Meanwhile, people are being injured by a certain culprit. Conan soon realizes that these people all have some kind of relation to Mouri, and that they all had a number in their name corresponding to a playing card and were being targeted in order, from the king down to the ace. The police soon decide that a murderous card dealer who just got out of jail and wanted revenge on Mouri is behind it. However, as injuries become murders and it is a race to predict who the next victims will be, Conan soon finds that the truth is something completely different, while learning about the incident from 10 years ago in the process.
 
(Source: Anime News Network)

Taking the original story of Detective Conan, this first Conan film follows his adventures as he struggles to find and capture a mad bomber who's loose in his home town. Chasing bomb after bomb, Conan must stop him before he destroys a skyscraper in the middle of the city, which has the potential to cause millions of dollars in damage and kill hundreds. Who's planting the bombs? What are his motives? Gather clues with Conan and find out!

Kyokuichi Tokyo Movie Shinsha