There is a certain Celebi you should all know about. The reason is because her power far surpasses all of ours, even the strongest of elder gods. The reason why?

In the beginning of time during the forging of the world, the Celebi were a race created to assist in the building, structuring, and repairing of time. They were a widespread species, but when their purpose was fulfilled they began to die off from infertility. One Celebi in particular saw this happening and wanted to prevent her race’s demise.

Illia was a particularly smart Celebi, but she was also absent-minded and unrealistic. She wanted to restore her entire race to its former glory by restoring the race’s fertility. Her attempts failed, however, and hope started to slip from her grasp. Then she came up with a new solution - discover a divine way of increasing her fertility.

Her plan was successful in the end, though now she will never reveal her method. She was too successful - upon using the divine method on herself, she spontaneously grew a set of male endowments and they, along with her fertility, started growing. She could literally feel herself producing enough semen to fertalize thousands of Celebi, and within her womb she could feel herself producing enough seeds to repopulate her entire race single-handedly! Only, her fertility kept growing... and growing... and GROWING! Nothing could stop her!

Illia very swiftly overtook the continent with her growing size. Euphoria bombarded her as orgasm wracked her body over and over, forcing her to spew oceans of cum that undid everything the creators had worked to achieve. It didn’t stop there - The world collapsed under her immense endowments as her fertility kept growing stronger!

Earlier, Illia had been excited for her race, then she grew surprised at her growth. Now she was simply terrified, wondering when she would stop. Orgasm kept wracking her, generating more cum and femcum that sprayed out of both ends. As she grew bigger, her jets of fertile seed grew larger and took out more of the cosmos. Even worse, Illia could feel her growth accelerating the longer it went on! Nothing could stop her or slow her down!

Merely an hour after restoring her fertility, Illia outgrew the universe and everything in it. At that point, she had given up on stopping herself. She wasn’t content to let her growth run rampant, but she didn’t have the power to stop it.

Then all at once, she did. No explanation - just... a sudden burst of power. Illia felt woozy, like she’d consumed all the caffeine in the broken world she’d lived in before. And then that power grew bigger, thousands of times bigger - millions, billions, and far far more. With this newfound power, Illia reigned in her growing fertility all at once and contained it within herself. She stopped growing - her fertility was still increasing rapidly, but now it would neither show nor destroy everything.

Illia tried to relax her grip a few times at that moment but it was futile - letting her slip even the slightest bit would almost certainly grow her to her true size. Instead, she decided to devote most of her power to containing herself and used a small amount to reverse the damages she’d caused.

Everything she’d done was fixed in the span of a nanosecond - many many years to the Celebi. Throughout the process, she could feel her fertility growing stronger - the whole multiverse couldn’t contain her true size by the end of it. She couldn’t undo the original spell that caused her to grow so much - somehow, that event had escaped the fabric of time. Nothing could change it.

Thus, Illia was left with three questions - how did she gain so much power, how could she use it, and how big would she grow?

The first question became apparent to Illia as she lived her now-immortal life. Arceus himself gave Illia the seeds to grow power even greater than his own, for all that power was necessary to contain her. Her second question was never truly answered, for Illia discovered new uses for her power every day. Eventually she settled into a small series of duties for herself - one involved guarding artifacts of creation from abusers, and another involved restoring the fertility of races that truly needed it. She also realized that her own race didn’t truly need to be restored, as their lineage would be carried on by other beings - their descendents who evolved past them and escaped the trap of infertility. Even so, she also found that the remaining Celebi from the time gained immortality as well, and some of them even found their own, more proper ways to restore their fertility.

The third question, Illia felt, would never be answered. Every day and night she grew bigger, growing faster all the while. She often paused to rub her erect cock, wrapped in vines as if to remind herself that her fertility had to be contained. All of existence could easily be conquered by the slightest slip of herself. It was almost like she was the ultimate example of self-control: 99.9% of her power went to containing her infinitely growing fertility, yet even so she lived as normal a life as she could.

Of course, fertility like Illia’s has consequences other than endless growth. As time passed, Illia began to notice an odd effect of hers - her very presence made other Pokemon aroused, and some of them even grew hyper. Her semen had the same effect, only amplified many times. She often used this to create great forests whenever the world needed more trees.

Although she generally avoided contact with other Pokemon, Illia sometimes made friends. She had a somewhat-active sexual lifestyle with most Pokemon she knew - it was unavoidable when she caused others to have giant cocks or overly leaky pussies, not that any of them ever minded. Illia’s control over herself has grown over time, to the point where even orgasm doesn’t break her hold over herself.

Illia does now what she’s always done - protect her artifacts and protect the universe - all of existence, really - from herself. Every now and again, though, she meets a Pokemon who can’t get enough of a big thing. Sometimes - not often, but sometimes - she lets herself go just for them...